Earliness and duration of grain fill in winter wheat

1992 ◽  
Vol 72 (1) ◽  
pp. 35-48 ◽  
Author(s):  
T. L. Housley ◽  
H. W. Ohm
Keyword(s):  
Genetic Diversity ◽  
Triticum Aestivum ◽  
Winter Wheat ◽  
Triticum Aestivum L ◽  
Kernel Weight ◽  
Daily Temperature ◽  
Day Length ◽  
Effect Of Temperature ◽  
Average Daily Temperature ◽  
Influence Of Temperature On

The duration of grain fill in wheat (Triticum aestivum L.) is one of the determinants of kernel weight. The purpose of this research was to investigate the genetic diversity for duration of grain fill in winter wheat. In one experiment the genetic diversity for duration of grain fill and the influence of temperature on heading, anthesis and duration were assessed in 175 cultivars and lines of diverse plant type and origin planted at the Purdue Agronomy Research Center. The effect of temperature on the rate and duration of grain fill was further assessed in two cultivars, Fundulea and Caldwell, over 4 yr. In a second experiment Fundulea and Caldwell were grown in the field under altered day length (12, normal, 17 h) to manipulate date of anthesis. Duration of grain fill in the 175 entries averaged 28 ± 0.9 d. Heading occurred on 17 different dates, anthesis on 13 different dates and grain maturity on 17 different dates. The average daily temperature (ADT) during grain fill ranged between 21.2 and 22.5 °C. Comparisons of the ADT through grain fill for Fundulea and Caldwell over 4 yr indicated a 0.83-d reduction in duration for each degree rise in ADT. Leaf area, plant height, and tiller number were similar for cultivars exposed to 17 h, 12 h, or normal day lengths. Anthesis was 5 d earlier and the ADT during grain fill was less (20–21 °C) in plants exposed for 17 h compared to those exposed for 12 h (22 °C). Weight of 1000 kernels was significantly higher in plants with early anthesis dates, but yield was not significantly changed by the day length treatments. There appeared to be genetic differences in temperature sensitivity during reproductive development which could be exploited in selecting cultivars suitable for early anthesis. The general similarity of duration for all experiments suggests that environmental constraints imposed by latitude and selection for yield, have led to a narrow germplasm base regarding duration of grain fill.Key words: Triticum aestivum, average daily temperature during grain fill, duration of grain fill, anthesis, heading

scholarly journals GENETIC DIVERSITY OF WINTER WHEAT (Triticum aestivum L.)

2017 ◽  
Vol 6 (6) ◽  
pp. 1233-1236
Author(s):  
Andrea Pešková ◽  
Zdenka Gálová ◽  
Tímea Kuťka Hlozáková
Keyword(s):  
Genetic Diversity ◽  
Triticum Aestivum ◽  
Winter Wheat ◽  
Triticum Aestivum L

VALOR, A WINTER FEED WHEAT FOR THE MARITIMES

1982 ◽  
Vol 62 (2) ◽  
pp. 505-507 ◽  
Author(s):  
D. R. SAMPSON ◽  
H. G. NASS
Keyword(s):  
Triticum Aestivum ◽  
Powdery Mildew ◽  
Winter Wheat ◽  
Triticum Aestivum L ◽  
Kernel Weight ◽  
Winter Survival ◽  
Test Weight ◽  
Grain Protein ◽  
Maritime Provinces ◽  
Yield Test

Valor is a new, medium-hard, red winter feed wheat (Triticum aestivum L.) that is adapted to the Maritime Provinces of Canada. Valor was licensed in July 1981. Compared with Lennox, the principal winter wheat of the area, Valor has slightly higher yield, test weight and 1000-kernel weight, as well as greater winter survival and more resistance to powdery mildew. Valor has slightly weaker straw and lower grain protein.

scholarly journals Impact of nitrogen topdressing on the quality parameters of winter wheat (Triticum aestivum L.) yield

2020 ◽  
Vol 49 (3) ◽  
pp. 244-253
Author(s):  
A. Eser ◽  
K.M. Kassai ◽  
H. Kato ◽  
V. Kunos ◽  
A. Tarnava ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Crop Production ◽  
Wheat Gluten ◽  
Triticum Aestivum L ◽  
Kernel Weight ◽  
Grain Protein ◽  
Untreated Plot ◽  
Wheat Varieties ◽  
Wide Range

Scope of the study was to find more effective N fertilisation doses and applications to reach not only higher quantity but better quality grains as well as to be able to help preserving the continuity of feed and food quality improvement, since wheat is one of the most consumed crops all over the world.Samples of winter wheat (Triticum aestivum L.) varieties harvested from the experimental field of the Szent István University in two consecutive crop seasons had been examined in the laboratory of the Crop Production Institute. Effects of nitrogen (N) application on the performance of grain protein were tested. Five high quality winter wheat varieties were studied regarding grain quality traits affected by applying undivided and split doses of N. The evaluated samples show that increasing doses of N topdressing and increasing time of application have beneficial effects on the yield and the value of protein content. Wheat grain protein value ranged between 9.9% of the untreated Mv Karéj and Alföld, where the 120+40 kg ha-1 N was applied resulting in the highest value of 16.0%. Similarly, the gluten values among untreated and N applied plots were in a wide range. Mv Karéj had the lowest wheat gluten value on untreated plot with 18.4% and Alfold had the highest value with 36.8% on the plot where the 120+40 kg ha-1 N was applied. There were no significant changes recorded on test weight and thousand kernel weight. In the case of baking quality, there were significant differences between varieties. The best records were obtained in the case of Mv Toborzö followed by Mv Karéj.

THE EFFECT OF IRRIGATION TIMING ON YIELD AND YIELD COMPONENTS OF WINTER WHEAT

1983 ◽  
Vol 63 (4) ◽  
pp. 815-823 ◽  
Author(s):  
M. L. HOOKER ◽  
S. H. MOHIUDDIN ◽  
E. T. KANEMASU
Keyword(s):  
Triticum Aestivum ◽  
Winter Wheat ◽  
Yield Components ◽  
Triticum Aestivum L ◽  
Kernel Weight ◽  
Significant Response ◽  
Seeding Rate ◽  
Cropping Season ◽  
Yield And Yield Components ◽  
Irrigation Treatments

A study was conducted in southwest Kansas to evaluate the effect of limited water applications at critical growth stages on yield and yield components of winter wheat (Triticum aestivum L.). The experiment was a split-plot design. Irrigation treatments were main plots and cultivar × seeding rate combinations were subplots. The irrigation treatments were: Preplant (PP), PP + jointing (JT), PP + flowering (FL), and PP + JT + FL. Two cultivars (Centurk and Newton) were seeded at rates of 22, 45, and 67 kg∙ha−1. The experiment was conducted over a 2-yr period. During the first cropping season grain and straw yields showed a significant (P < 0.05), positive response to irrigation water applications at the JT growth stage, compared to the PP and PP + FL treatments. There was no significant effect of water treatments on heads per square metre, kernels per square metre or kernel weight. The second cropping season resulted in a positive, significant response of straw yields to irrigation treatments, but no significant response of grain. Grain yield response was nullified by greater kernel weight on the treatments that were most limiting in soil water during early reproductive development (PP and PP + FL).Key words: Triticum aestivum L., limited irrigation, moisture stress, seeding rate, kernel number, kernel weight

STUDIES WITH HYBRID WHEAT IN ONTARIO

1970 ◽  
Vol 50 (4) ◽  
pp. 485-491 ◽  
Author(s):  
R. K. RAI ◽  
N. C. STOSKOPF ◽  
E. REINBERGS
Keyword(s):  
Genetic Diversity ◽  
Triticum Aestivum ◽  
Grain Yield ◽  
Triticum Aestivum L ◽  
Kernel Weight ◽  
Hybrid Wheat ◽  
Male Sterile ◽  
Seeding Rate ◽  
Yield Increase ◽  
Flour Production

An F1 hybrid from parental wheat (Triticum aestivum L.) cultivars with wide genetic diversity yielded 7329 kg/ha, a 26% increase over the higher yielding parent. Two other crosses resulted in an F1 yield increase of 15 and 5%. The best hybrid outyielded Genesee, which averaged 6177 kg/ha, by 19%. All data were averaged over a two-year period and were obtained at a standard seeding rate. Grain yields decreased from the F1 to the F2 generation in all three crosses and in the best cross from 26 to 13%. Heterosis for grain yield was manifested primarily in tillering and kernels per spike. Tillering increased by 6.9% and kernels per spike by 8.2%, while kernel weight increased by 1.0%, over the higher parent. An increase in plant height was observed. Milling and baking characteristics of F1 crosses, made within the soft wheat class, were closer to the softer quality parent. Baking quality declined in the F2 generation. Seed produced from two male sterile lines, however, had poorer milling and baking characteristics than seed from their self-fertile counterparts, and this may present a problem for soft quality flour production.

Genetic Diversity of Winter Wheat (Triticum aestivum L.) Revealed by SSR Markers

2012 ◽  
Vol 51 (3-4) ◽  
pp. 223-229 ◽  
Author(s):  
Funda Senturk Akfirat ◽  
Ahu Altinkut Uncuoglu
Keyword(s):  
Genetic Diversity ◽  
Triticum Aestivum ◽  
Winter Wheat ◽  
Ssr Markers ◽  
Triticum Aestivum L
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