NDSU Extension - Ramsey County

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July 19, 2010 - Agriculture Column

Howdy!!!

I not writing much today as I need to get the below information out to area county growers.  A new winter wheat is being released, from Montana, and if you are an interested county grower you need to contact our office immediately.  Deadline for our request is August 2.  I will also included the GDD’S of 1065 units, 66 units ahead of normal.  Corn is growing very quickly and much of it starting to tassel.  I saw a field of Barley that will likely be swathed by the end of the week or the early part of next week and of course winter wheat is getting very close.

Pedigree:        Decade, tested as experimental MT0552 was selected from a composite of three closely related single cross F1 populations: N95L159/CDC Clair, N95L159/MT9602, and N95L159/MT9609. N95L159 is a sib of ‘Wesley’ with the pedigree KS831936-3//Colt/Cody. MT9602 has the pedigree NuWest/Tiber and MT9609 has the pedigree Froid/SD1287//Redwin/3/NuWest.

Recommendation:     Protected MAES Public Release (F.2.b). Joint release with NDSU.

Name:             To be named ‘Decade’ denoting the extended time period (1997-2009) of cooperative winter wheat cultivar development research conducted by the MSU winter wheat breeding program and the Williston Research Extension Center that resulted in release of this cultivar.
 

Description:    MT0552 is an awned, white-glumed, semi-dwarf hard red winter wheat. MT0552 has medium-early maturity, 163.2 d heading from 1 January, 1.3d earlier than ‘CDC Falcon’ and 2.2d earlier than ‘Jerry’ (Table 2). MT0552 is semi-dwarf (Rht1) and medium-short (30.8 inches, n=44), 1.4 inches taller than CDC Falcon and 4.3 inches shorter than Jerry. Coleoptile length of MT0552 under controlled conditions is 3.1 inches, longer than that of CDC Falcon (2.8 inches) and equivalent to that of Jerry (3.1 inches). Straw strength of MT0552 is good. MT0552 is resistant to prevalent races of stem rust (Sr24) and stripe rust but susceptible to leaf rust. MT0552 is hollow-stemmed and susceptible to wheat stem sawfly. Winterhardiness of MT0552 is high, similar to that of CDC Falcon and Jerry (Tables 2 and 3). MT0552 is most similar to CDC Falcon and is best adapted to western North Dakota and eastern Montana which require higher levels of winter hardiness.

MT0552 has prostrate juvenile plant growth habit with a green plant color at the boot stage. MT0552 has a middense, erect head with white awns.  Kernels are red and hard-textured. MT0552 has been genetically uniform and stable over four generations of seed increase with visually obvious tall plant variants under environmental conditions favorable for height expression. MT0552 contains a tall plant variant (up to 30 cm taller under conditions favorable for maximum height expression) at a frequency less than 25 per 10,000 plants. Evidence from molecular markers for Rht1 and height segregation in progeny of MT0552 indicates these tall off-types result from aneuploidy of chromosome 4D which occurs spontaneously at a low frequency (hemizygous for Rht1). Similar spontaneous aneuploidy and height variation has been reported for Rht1 semi-dwarf hard red spring cultivars including ‘Grandin’, ‘Hi-Line’, and ‘Len’ (0.14 to 0.26% tall monosomic plants, Crop Science 36:1521-1522).

Characteristics/comparisons:

Yield. In 45 location-years (LY) of testing in the Montana Winter Wheat Intrastate and Off-station nurseries average yield of MT0552 (65.1 bu/a) was the 2nd highest among tested cultivars, statistically similar to the yields of Yellowstone, Wahoo, CDC Falcon, Pryor, Jagalene, and Norris (Table 2). The line performed well at all Montana locations indicating broad adaptation and good winter hardiness. MT0552 also yielded well across 17 trials in North Dakota, averaging 58.7 bu/a, statistically similar to yields of Darrell, CDC Falcon, Yellowstone, and Millenium. In western North Dakota and eastern Montana where this line appears to be best adapted, MT0552 was the highest yielding line compared to seven adapted cultivars. Performance of MT0552 in central and eastern North Dakota over five trials was average but not outstanding. For comparison purposes, MT0552 appears to be most similar to CDC Falcon with reduced plant height and relatively high cold tolerance. MT0552 and CDC Falcon are similar for grain yield in both Montana and North Dakota.

Test weight. Test weight of MT0552 (61.1 lb/bu over 44  MT LY and 58.9 lb/bu over 17 ND LY) was medium to high relative to other cultivars (Tables 2 and 3). Relative to CDC Falcon, test weight of MT0552 was higher in MT (+0.9 lb/bu) and similar in ND (+0.2 lb/bu).

Winter survival. Based on nine environments where differential winter survival occurred, MT0552 exhibited good winter survival similar to CDC Falcon and Jerry.

Maturity. MT0552 is medium to early, heading about the same date as Jagalene in both Montana and North Dakota, about 1.5d earlier in heading that CDC Falcon, 2.2d earlier than Jerry, and 3.0d earlier than Yellowstone.

Plant height. MT0552 is an Rht1 semi-dwarf similar in height to Jagalene, averaging 30.8 inches in MT (Table 2) and 28.3 inches in ND.  MT0552 was 1.0 to 1.4 inches taller than CDC Falcon and 3.5 to 4.3 inches shorter than Jerry. Straw strength of MT0552 is excellent with significant lodging occurring only twice in 45 MT trials under high-yield, irrigated conditions.

 

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