Oakes Irrigation Research Site
Carrington Research Extension CenterNorth Dakota State University
P.O. Box 531, Oakes, ND 58474-0531, Voice: (701) 742-2744, FAX: (701) 742-2700, E-mail: Walter.Albus@ndsu.edu

 

NDSU Corn Breeding Research at the Oakes Irrigation Research Site

 

 

Introduction

2006 NDSU Corn Breeding Experiments at Oakes

Inbred Line Development

Germplasm Adaptation and Improvement

Non-transgenic Approaches to Drought Tolerance

Grain Quality

Graduate Students

Personnel in 2006

Final Thoughts

Table 26.  Late Generation Testing of Experimental Hybrids Produced with North Dakota Advance Lines

Table 27.  Early Generation Testing of Experimental Hybrids Produce with North Dakota Lines Adapted from Topical and Late Temperate Regions

 

Introduction

            North Dakota State University (NDSU) has officially over a 75-year history of com breeding research.  The NDSU com breeding program is the only U.S. North American public program that develops very early maturing drought tolerant com lines and hybrids while actively training the next generation of breeders (MS and Ph.D. Graduates).  The NDSU com breeding goals relative to North Dakota (ND) producers are; early maturity and yield/moisture performance index (identifying those early-maturing hybrids that outperform late-maturing ones), above average lodging resistance and test weight, drought and heat tolerance and stability across locations, good emergence in cool soils, early seedling vigor, disease and pest resistance including GMOs and value-added traits (e.g. grain quality for bio-fuels, fibers, etc).

            The NDSU com breeding program has grown to a record of 20,000 plots across 15 locations and our products have extensively been requested by industry.  We had about 40 requests for germplasm from other public and private programs last year.  The request were mainly inbred lines due to; fast dry down, early maturity, good performance and quality, and new sources of genetic diversity within early maturing germplasm.  In 2006 we continued a nursery for drought tolerant research, maintained our large cooperation with industry and increased our testing efforts.  We maintained two winter nurseries (on site cooperation for two seasons per year), one greenhouse (three seasons per year), one disease nursery and one shared molecular and quality lab.  The lab has the potential and the target of testing quality samples for the whole breeding program that is currently at 20% (~4000-5,000 plots).

            Collaboration between the Oakes Irrigation Research Site and NDSU com breeding has been extensive through the years especially since 1999.  Following the target of the Oakes Irrigation Research Site to expand research on traditional crops, the NDSU com breeding program concentrates on research in basic and applied com breeding for the northern Com Belt. The program emphasizes; germplasm adaptation and improvement, inbred line and population development, and hybrid testing.

 

2006 NDSU Corn Breeding Experiments at Oakes

            Oakes is part of a large network of 15 ND testing locations that the NDSU com breeding program utilizes to obtain reliable data in order to make release decisions.  Extensive testing allows us to accurately separate genetic from environmental effects annually in order to make top selections.  Most of our efforts at Oakes focused on early-maturing hybrid testing followed by germplasm adaptation and improvement with drought tolerance and grain quality efforts for feed and fuel purposes.  In 2006, we have decided to release six new early maturing lines and three new improved com populations as new sources of early maturing com for western and eastern dryland and irrigated ND conditions.

            NDSU com breeding experiments were planted on May 5, 2006 and harvested during the first two weeks of October 2006.  This station had 10 breeding and genetics experiments under irrigated conditions.  Most of those experiments were devoted to inbred line development and hybrid testing while some concentrated on; germplasm adaptation and improvement, drought tolerance, grain quality and graduate student theses.

 

Go to top of corn breeding study

 

Inbred Line Development

            NDSU supports our major component of inbred line development for research and training purposes.  Extensive data was generated from the 2006 field tests with the purpose to determine the relative effectiveness of selection studies for developing new early-maturing genotypes that can be used either in hybrids or as germplasm in pedigree selection programs. These lines are the result of an extensive pedigree selection methodology including thousands of lines and over four years of nursery line screening as well as early and late generation hybrid testing across locations, years and industry testers.  Thanks in part to the efforts at Oakes two of the new inbred lines seem promising for use as parents for 70 to 85RM hybrids while four new inbred lines seem promising for use as parents for 85 to 95RM hybrids.  Our early maturing hybrid trials included 10 experiments grown at three to 15 ND locations.  Over 1,000 ND hybrids were tested at early and late generation stages for yield, maturity, stand ability, and test weight performance.  Twenty-three new and early maturing ND experimental lines are at final stages for potential release in the fall of 2008.  These lines were sent to Puerto Rico for hybrid seed production each with six commercial inbred lines in cooperation with AgReliant Genetics Seed Co.  Meanwhile, 65 new and early ND experimental lines were selected for further testing and potential release in 2009.  During the breeding process, exposing thousands of hybrids to stresses and observing the poor performance of some hybrids in field plots within experiments is very desirable.  Hybrid weaknesses are exposed at some locations increasing the chances for the breeder to discard most of them and keep the top hybrids, usually the number of lines kept is less than a handful. 

In this annual report we show data for three six single-cross hybrid experiments that include lines at pre-release stages. These lines have been crossed to commercial lines to produce hybrids consisting of 50% NDSU background (Tables 26 and 27). They were arranged in partially balanced lattice designs in two replications with incomplete blocks with the purpose to reduce the experimental error.  As a consequence, several traits including grain yield were significantly better and more accurately estimated with significantly lower experimental errors than if the experiment were arranged as a randomized complete block design with more replications (note the better estimates obtained for lattice designs compared to the randomized complete block design with three replications used for the industry trial shown in Table 18). 

Note the excellent potential of lines derived from tropical and late-temperate areas (see Table 27 and the section on germplasm adaptation and improvement) and lines already adapted to ND after years of successful adaptation efforts.  These experimental lines have demonstrated better yield potential and earliness than popular commercial hybrids.  Even though many are still at experimental stages they are similar in performance to the commercial hybrids at Oakes (Table 27).

The industry trial (Table 18) coordinated by the NDSU com breeding program consisted of a large cooperation between; several industry cooperators, the Oakes Irrigation Research Site and the NDSU com breeding program.  ND producers can take advantage of public com performance trials by selecting their hybrids with unbiased results, increasing their earnings, and reducing their costs.  Producers can compare genetically modified and conventional hybrids based on unbiased trials and assess the value of technology fees established by the industry. The published information has an important economic impact considering the increasing number of acres devoted to com in North Dakota.  An average least significant difference (LSD) of 29.3 bu/acre was reported for grain yield in Oakes. Therefore, ND com producers can increase their income by $211 million annually if choosing adequate hybrids for their farms (considering 1.8 million acres, LSD, and $4.00/bu).  Other traits, especially grain moisture at harvest (and Performance Index) and test weight, should be watched closely in order to reduce the costs and risks associated with com production.

 

Go to top of corn breeding study

 

Germplasm Adaptation and Improvement

Adaptation and germplasm improvement efforts have continued due to our long-term cooperation with the national United States Department of Agriculture - Germplasm Enhancement Maize (USDA-GEM) program and our efforts on intra and inter-population recurrent selection programs.  We currently have four full-sib reciprocal recurrent selection programs that address the creation of new heterotic patterns for the region and are a consequence of the extensive testing performed for choice of germplasm.  NDBSK(HI-M)C3, NDBS11(FR-M)C3 and NDBS1011 were adapted and released as improved germplasm sources for development of inbred parents for early maturity and high yielding com hybrids and as elite parents for early maturing maize population hybrids.  Results from Oakes and other ND research centers have shown a genetic improvement in earliness of six to eight days in just three years of selection as well as improvements in grain yield, test weight, and grain moisture at harvest.  Other tropical and late temperate elite populations are under adaptation and extensive testing as well.  In 2006, we continued our research devoted to germplasm adaptation with GEM material in the northern Com Belt.  AR16026:S17-66-1-B (coded as GEM21) derived lines, adapted through the incorporation of elite early-maturing line ND2000, were test crossed to LH176 and to a coded Bt commercial tester from Syngenta representing the Iodent heterotic group.  Six-year efforts of adaptation are yielding several adapted lines with better yield and agronomic performance than popular hybrid Pioneer 39D82 (Table 27). During this season, we have maintained our four full-sib reciprocal recurrent selection programs involving BS21, BS22, NDSAB, Leaming, CGSS, and CGL derived early-maturing populations after creating new heterotic patterns.  We have continued our intra-population recurrent selection efforts for germplasm improvement on populations that have demonstrated good potential for inbred line development. 

 

Non-transgenic Approaches to Drought Tolerance

Even though the ethanol industry is expanding, especially in central and western ND, com is still limited in its west extension due to significant environmental challenges, mainly drought.  The main economic benefit to the farmer and industry in this state continues to be the current availability of productive early-maturing lines with high starch under abiotic stresses, a priority within the NDSU com breeding program.  Results so far indicate that over 700 ND lines (out of 3,500) have a large potential of transmitting drought tolerance to their hybrids and these were produced in our 2006 summer nursery.  Efforts have been initiated to understand the mechanisms of polygenic effects involved in drought tolerance by annually testing over 4,000 genotypes (early generation inbreds and hybrids) through non-transgenic approaches, a complementary approach to industry.  This has been made possible by increasing our drought management in winter nurseries and extending our testing efforts.  We were successful especially with the dry year that was characteristic for 2006.  This has allowed us to develop and identify early drought tolerant products in the most efficient way possible in order to cover the short-term demand ethanol plants will have on ND com.  In order for ND to get advantage of this opportunity, ND com hybrids should be well adapted (e.g. early enough) to be harvested and utilized.  Otherwise, there would not be a com-ethanol relationship for ND.  NDSU extensively tests com hybrids not only in eastern ND but also in western ND.  We witnessed large differences among hybrids for drought tolerance with NDSU hybrids being the most tolerant.  These differences were clear not only in western locations but also under irrigation at Oakes.

 

Go to top of corn breeding study

 

Grain Quality

Following an award from the state Agricultural Products Utilization Commission (APUC) and in cooperation with industry we have initiated the screening of germplasm for grain quality traits for the development of com hybrids specific for processing and ethanol utilization.  Our germplasm has shown a great variation for grain quality components, especially starch and protein concentration.  Our com breeding program has continued its focus on the development of very early-maturing inbred lines reducing the risks associated with late planting, early frost, and low grain quality.  Extensive testing across locations have shown that some early-maturing hybrids (in cooperation with certain industries) are similar in grain yield and lodging performance, above average test weight (~3 Ib/bu) and below average grain moisture at harvest (~40 g kg-1) compared to dominant commercial com hybrids available in ND.  Mating design studies, including reciprocal crosses, have evaluated not only combining ability effects but also maternal and reciprocal effects.  Most traits, including endosperm-related traits, have not shown significant maternal and reciprocal effects.  In cooperation with industry, we are planning studies for understanding the genetics of test weight and dry down as well as grain quality components including com fibers.

 

Graduate Students

The demand for applied com breeders is currently very high and training the next generation of breeders continues to be a priority within NDSU.  In the past eight years the NDSU com breeding program has trained an average of one student per year.  All of them havee been hired by industry; (Monsanto, Pioneer), USDA, NDSU, and University of Delaware.  Half of the Plant Science Ph.D. graduates in 2006 came from our program.  Four graduate students (2 Ph.D. and 2 MS) and one visiting scientist (Com Breeding Director at LAAS, Shenyang, China) were trained in our breeding program during 2006.  One Ph.D. graduate was hired by the NDSU Canola Project and another was hired by NDSU as the dry bean breeder.  One MS student has successfully defended his thesis and was hired as a Ph.D. com breeding student at the University of Delaware.  Graduate student theses and dissertations focused on molecular studies in disease resistance, conventional breeding approaches to cold tolerance and grain quality, as well as genetic effect estimation through quantitative genetic methods (e.g. mating designs).  All graduates are applying what was learned at the NDSU com breeding program.  Clarissa Barata has expressed that our program has made easier her productivity and progress at Monsanto.  Another example is that Juan Osorno has mentioned his willingness to change his dry bean trials to more efficient experimental designs based on his learning at NDSU com breeding program.  In addition to research and advising, I teach two graduate courses (Crop Breeding Techniques and Quantitative Genetics), serve as editor in Euphytica and Maydica, and serve as chair in the maize registration sub-committee of Crop Science Society of America.

 

Go to top of corn breeding study

 

Personnel in 2006

M. J. Carena                                        Project Leader

Duane Wanner                                   Research Specialist

McDonald Jumbo                                MS Graduate (Mating Designs)

Marcelo Melani Ph.D.                          Graduate (QTLs/Disease Resistance)

Juan Osorno Ph.D.                             Graduate (Genetic Div/Quality Traits)

Bahadir Sezegen MS                          Student (Cold Tolerance/Rec. Selection)

Colins Eno MS                                    Student (Adaptation/Combining Ability)

 

Final Thoughts

Local genetic adaptation is essential for ND environmental challenges.  In Oakes, these environmental challenges are mainly the short period between killing frosts and limited heat units.  However, an irrigated site can also tell us how corn can handle drought stress.  Research is essential to identify the genetic differences in hybrids affecting grain yield in irrigated vs. dryland environments.  Even though the demand for corn from ethanol will increase in ND, ethanol plants will only utilize ND corn hybrids if they are early maturing with above average drought tolerance, grain quality, and stand ability.  Only breeding can improve those traits.  Therefore, choice of the best genetics (hybrid) should be the priority over any management input that allows full expression of the genetics available in the seed.  Only the selection performed in breeding can develop new products utilizing less nitrogen fertilizer at a reduced cost.  By evaluating what is currently in the market (all commercial hybrids have been developed under high nitrogen levels) no hybrid will be efficient for low nitrogen utilization.  The breeder wants to acknowledge the willingness of the Irrigation Research Site and the ND Corn Council Utilization to support the NDSU corn breeding program in its goal to develop early maturing corn products adapted to the challenging ND conditions.  Keeping up with the future corn demand in the state needs a strong public research program focused on breeding and genetics. 

 

Go to top of corn breeding study

 

Table 26.  Late Generation Testing of Experimental Hybrids Produced with North Dakota Advance Lines at the Oakes Irrigation Research Site in 2006.

 

Grain

PERF.

Grain

Root

Stalk

Test

Hybrid

Yield

INDEX

Moist

Ldg

Ldg

Weight

 

bu/A

PI

%

%

%

lb/bu

TR3621 Btll X TR1017

243.7

137.4

19.4

0.0

0.0

56.8

TR3621Bt X ND00-50

225.3

125.6

19.7

0.0

0.0

55.8

Nutech NT5779RR/YGCB

221.7

117.5

20.7

0.0

0.0

55.9

Proseed 581RR/Bt

218.3

127.8

18.6

0.0

8.6

57.3

NP2123Bt X ND01-32

212.5

117.5

20.0

0.0

3.4

56.4

TR3621 Bt X ND01-32

211.6

105.6

21.9

0.0

0.0

54.2

Nutech NX5082RR/YGCB

208.6

128.2

18.0

0.0

0.0

56.5

ND01-27 X TR3026

208.1

114.7

20.2

0.0

0.0

58.5

Mycogen 2P172

207.9

131.6

17.5

0.0

0.0

58.3

Hyland HLB264

205.9

122.0

18.1

0.0

0.0

56.6

NP2123Bt X ND01-4

205.3

108.4

20.9

0.0

0.0

52.1

Wensman W6084Bt/RR

205.2

124.5

18.0

0.0

0.0

57.1

LH176 X ND01-4

203.4

110.3

20.3

1.7

1.8

52.4

TR3621Bt X ND01-4

202.9

108.3

20.6

0.0

0.0

53.4

TR3621Bt X ND01-2

202.4

111.2

19.1

0.0

0.0

55.5

PIONEER 39D80

202.1

130.0

11.1

0.0

2.9

55.5

LH176 RR2 X TR3013

201.8

128.0

17.4

0.0

13.0

54.1

Nutech NT9383RR/YGPL

201.7

120.5

18.1

0.0

0.0

57.1

TR3621 X TR1017

201.4

116.8

19.0

0.0

0.0

58.5

PIONEER 39D82

200.3

124.2

11.9

0.0

0.0

54.1

Mycogen X 25102

199.4

105.4

20.5

0.0

0.0

58.2

LH176 X ND00-50

199.1

116.2

19.0

0.0

3.6

54.5

ND01-27 X TR4563

196.8

112.1

19.4

0.0

1.6

54.3

TR4563 X ND01-4

196.4

102.3

21.0

0.0

8.0

51.3

NP2123Bt X ND01-27

195.0

115.5

18.6

0.0

0.0

57.4

TR3621 Btll X TR3127

194.9

106.0

20.0

0.0

0.0

56.1

LH298 X ND01-4

194.6

  96.3

21.9

0.0

0.0

51.5

TR2040 X TR1957Bt

192.6

110.3

19.3

0.0

0.0

56.0

LH298 X ND97-6W

192.6

111.7

18.9

0.0

0.0

56.2

LH298 X ND00-50

192.0

105.4

19.9

0.0

0.0

54.7

LH176 X ND97-6W

189.9

115.1

17.8

0.0

2.9

54.7

TR4033 X LH290

189.4

111.7

18.9

0.0

0.0

55.9

TR3127 X ND00-50

187.9

100.5

20.8

0.0

3.8

55.6

LH298 X ND01-32

186.7

105.0

19.7

0.0

6.5

52.3

Proseed 582RR/Bt

185.1

109.7

18.3

0.0

1.4

57.6

NP2123Bt X ND00-50

184.4

100.4

20.1

0.0

0.0

56.0

TR3026 Bl X TR1957

182.8

  96.9

20.6

0.0

0.0

56.0

TR4563 X ND97-6W

181.8

105.7

19.0

0.0

1.5

56.9

TR4563 X ND01-32

181.3

  99.9

19.8

0.0

0.0

53.8

TR3621Bt X ND99-8

180.8

107.2

18.5

0.0

0.0

59.1

TR3026 X ND97-6W

180.4

  98.4

19.9

0.0

14.1

59.3

ND01-28 X NP2123Bt

180.3

  98.8

20.0

0.0

0.0

54.3

TR1017Bt X ND01-27

180.1

109.0

17.9

0.0

0.0

59.6

NP2123Bt X ND97-6W

179.4

  98.5

20.0

0.0

13.9

57.1

Proseed 583

176.7

  96.2

20.1

0.0

6.5

57.9

TR1017Bt X ND01-32

176.5

119.0

16.3

0.0

3.1

55.5

TR3621Bt X ND00-24

175.7

108.8

17.9

0.0

3.2

58.1

TR1957 X ND01-27

174.2

  95.7

19.9

0.0

0.0

55.0

TR1017Bt X ND01-28

174.1

103.5

18.8

0.0

0.0

59.6

LH176 X ND01-32

173.5

  95.3

20.0

0.0

3.4

52.1

TR2040 X ND00-50

172.0

  95.9

19.6

0.0

6.5

55.5

TR3621Bt X ND01-27

171.6

100.5

18.5

0.0

0.0

57.3

TR1017Bt X ND01-4

171.4

106.8

17.1

3.5

2.9

55.8

Wensman W6082BtfRR

171.4

117.7

16.3

0.0

9.6

55.8

NP2123Bt X ND00-24

168.8

101.8

18.0

0.0

1.7

58.2

TR1957 X ND97-6W

168.6

  89.6

20.5

0.0

3.7

56.4

TR2040 X TR1957

167.6

  99.6

18.6

0.0

1.4

55.6

LH298 X ND01-27

166.8

  95.1

19.6

0.0

0.0

55.6

ND01-27 X LH176

166.8

  99.6

18.3

0.0

0.0

55.8

LH298 X ND00-24

166.7

  93.1

19.9

0.0

0.0

55.8

TR3026 X ND99-8

166.3

  90.5

19.9

0.0

4.8

58.6

NP2123Bt X ND99-8

164.1

100.0

18.2

0.0

0.0

58.8

TR2040 X ND97-6W

162.2

102.6

17.4

0.0

8.9

58.0

TR2623 X TR1017

161.9

  92.5

19.3

0.0

1.7

57.7

TR1017Bt X ND97-6W

161.9

  96.8

18.0

0.0

0.0

59.5

ND99-8 X TR1017Bt

161.7

  88.3

17.4

0.0

0.0

60.0

Experiment Mean

188.4

108.1

19.1

0.1

2.3

56.2

LSD (0.05)

31.6

 

1.3

1.1

10.1

1.5

C.V. (%)

9.0

 

4.2

870.8

168.0

1.4

 

Go to top of corn breeding study

 

Table 27.  Early Generation Testing of Experimental Hybrids Produce with North Dakota Lines Adapted from Topical and Late Temperate Regions at

 the Oakes Irrigation Research Site in 2006.

 

Grain

PERF.

Grain

Root

Stalk

Dropped

Test

Hybrid

Yield

INDEX

Moist

Ldg

Ldg

ears

Weight

 

bu/A

PI

%

%

%

%

lb/bu

LH176 X ND07-204

241.2

113.6

22.4

0.0

2.6

0.0

53.3

LH176 X ND07-252

229.2

106.9

22.3

0.0

2.8

0.0

53.0

LH176 X ND01-32

229.2

133.7

17.7

0.0

7.2

0.0

56.2

LH176 X ND07-228

218.8

111.8

20.5

0.0

1.4

0.0

57.1

LH176 X ND07-255

218.7

116.9

19.5

5.4

0.0

0.0

55.5

TR3026 Bt X TR1957

218.2

106.2

21.6

0.0

0.0

0.0

57.1

LH176 X ND07-220

215.3

106.9

21.0

0.0

2.9

0.0

54.3

LH176 X ND07-207

215.2

109.3

20.7

0.0

0.0

0.0

54.9

LH176 X ND07-246

215.1

112.0

20.0

0.0

0.0

0.0

55.2

LH176 X ND07-235

214.4

103.7

21.4

0.0

4.8

0.0

54.6

LH176 X ND07-260

214.0

110.4

20.1

0.0

1.1

0.0

55.8

ND07-210 X LH176

213.8

108.8

20.5

1.4

2.9

0.0

55.0

LH176 X ND07-236

213.0

106.7

20.8

0.0

0.0

0.0

55.8

LH176 X ND07-256

211.6

113.7

19.4

0.0

7.1

0.0

55.6

LH176 X ND07-210

210.7

103.1

21.3

0.0

2.0

0.0

55.0

Pioneer 39D82

210.1

113.1

19.2

0.0

4.0

0.0

54.5

LH176 X ND07-209

209.1

106.2

20.7

0.0

0.0

0.0

55.8

ND07-226 X LH176

206.9

104.3

20.8

0.0

10.6

0.0

55.2

LH176 X ND07-234

205.5

  97.8

22.0

0.0

2.8

0.0

54.6

LH176 X ND07-248

204.8

101.1

21.3

0.0

1.5

0.0

54.1

ND07-207 X LH176

204.0

105.2

20.5

0.0

2.9

0.0

54.2

LH176 X ND07-250

203.8

104.1

20.3

2.5

5.4

0.0

55.2

LH176 X ND07-244

203.7

  95.8

22.3

0.0

0.0

0.0

52.1

LH176 X ND07-226

203.1

102.8

20.6

0.0

0.0

0.0

55.1

ND07-245 X LH176

202.3

110.0

19.3

0.0

2.9

0.0

57.3

LH176 X ND07-258

201.9

  98.3

21.5

0.0

2.9

0.0

55.3

ND07-247 X LH176

201.7

108.1

19.6

0.0

0.0

0.0

55.4

LH176 X ND07-225

201.2

  98.5

21.4

0.0

0.0

0.0

55.6

LH176 X ND07-205

201.2

102.0

20.6

0.0

0.0

0.0

54.6

LH176 X ND07-241

199.2

  92.3

22.6

0.0

10.3

0.0

54.2

LH176 X ND07-245

198.5

  99.7

20.6

0.0

7.8

0.0

56.1

LH176 X ND07-218

198.4

100.8

20.6

0.0

1.4

0.0

56.3

LH176 X ND07-249

198.1

103.0

20.2

0.0

3.8

0.0

55.4

LH176 X ND07-208

197.8

102.3

20.4

0.0

3.2

0.0

54.4

LH176 X ND07-221

197.7

100.5

20.6

0.0

0.0

0.0

55.6

LH176 X ND07-247

197.6

100.2

20.6

0.0

6.2

0.0

54.2

LH176 X ND07-222

197.4

102.6

20.1

0.0

0.0

0.0

55.3

ND07-216 X LH176

197.2

104.1

20.0

0.0

0.0

0.0

55.2

LH176 X ND07-219

197.2

  95.4

21.5

0.0

1.4

0.0

53.9

LH176 X ND07-239

196.9

101.8

20.2

0.0

1.4

0.0

54.3

ND07-248 X LH176

196.9

  98.6

20.9

0.0

2.7

0.0

55.3

LH176 X ND07-214

196.7

100.3

20.6

0.0

7.1

0.0

55.4

LH176 X ND07-229

195.9

  93.5

21.9

0.0

0.0

0.0

53.0

TR2040 X TR1957

195.3

103.7

19.7

0.0

1.0

0.0

56.5

LH176 X ND07-257

193.4

  99.3

20.3

0.0

0.0

0.0

53.8

LH176 X ND07-202

192.3

  97.2

20.9

0.0

0.0

0.0

54.2

LH176 X ND07-243

192.1

  90.0

22.4

0.0

6.6

0.0

55.0

LH176 X ND07-237

191.5

102.1

19.7

0.0

2.3

0.0

55.5

TR3621Bt X TR3273

191.3

  99.0

20.4

0.0

2.8

0.0

58.4

LH176 X ND07-217

191.0

  98.6

20.4

0.0

4.3

0.0

55.7

LH176 X ND07-215

191.0

  93.7

21.2

0.0

4.9

0.0

55.4

LH176 X ND07-254

190.8

  95.2

21.0

3.6

1.8

0.0

55.5

LH176 X ND07-232

190.4

  93.4

21.3

0.0

0.0

0.0

55.7

LH176 X ND07-224

189.3

  96.9

20.5

0.0

2.7

0.0

55.1

LH176 X ND07-233

189.3

  93.5

21.1

0.0

4.2

0.0

55.2

LH176 X ND07-251

188.8

  87.3

22.4

0.0

6.5

0.0

54.1

LH176 X ND07-223

188.8

  96.5

20.4

0.0

6.8

0.0

55.7

ND07-217 X LH176

188.5

100.4

19.7

0.0

0.0

0.0

55.7

LH176 X ND07-206

188.4

  96.0

20.5

0.0

0.0

0.0

55.3

LH176 X ND07-216

187.8

  93.0

21.1

0.0

1.4

0.0

54.7

LH176 X ND07-203

186.5

107.0

18.1

0.0

6.0

0.0

55.7

LH176 X ND07-201

186.2

  93.7

20.6

0.0

6.3

0.0

55.4

LH176 X ND07-259

186.0

  94.8

20.4

0.0

11.1

0.0

54.7

ND07-219 X LH176

183.6

  90.0

21.5

0.0

2.9

0.0

54.0

LH176 X ND07-213

183.0

  94.4

20.3

0.0

1.5

0.0

55.9

ND07-214 X LH176

182.7

  93.6

20.6

0.0

0.0

0.0

54.1

LH176 X ND07-240

182.6

  95.8

19.9

1.6

1.6

0.0

55.6

LH176 X ND07-230

182.2

  86.7

22.0

0.0

7.3

0.0

54.5

LH176 X ND07-242

182.1

  95.6

20.0

0.0

5.4

0.0

57.2

LH176 X ND07-212

182.0

  96.0

19.8

0.0

2.6

0.0

57.0

LH176 X ND07-231

181.2

  93.7

20.2

0.0

0.0

0.0

60.0

ND07-234 X LH176

179.3

  83.7

22.5

0.0

4.4

0.0

52.9

LH176 X ND07-238

176.7

  86.6

21.2

0.0

0.0

0.0

56.8

LH176 X ND07-253

175.7

  87.1

21.0

0.0

2.6

0.0

55.6

ND07-220 X LH176

175.3

  86.2

21.5

0.0

11.7

0.0

54.2

Experiment Mean

198.2

100.4

20.7

0.2

3.0

0.0

55.2

LSD (0.05)

27.3

 

1.1

2.9

6.3

0.0

1.1

C.V. (%)

9.0

 

3.6

641.3

144.4

0.0

1.8

 

Go to top of corn breeding study

 

Go to Oakes Irrigation Research Site Variety Performance Trials

Go to Oakes Irrigation Research Site crop index

Go to Oakes Irrigation Research Site 2006 Annual Report

Go to Oakes Irrigation Research Site home page