USE OF SPIKE MOISTURE CONTENT AS AN ALTERNATIVE TO KERNEL MOISTURE CONTENT AND DAYS TO RIPE IN THE MEASUREMENT OF RELATIVE MATURITY IN SPRING WHEAT

1990 ◽  
Vol 70 (1) ◽  
pp. 99-105 ◽  
Author(s):  
J. B. THOMAS ◽  
P. J. CLARKE ◽  
G. B. SCHAALJE
Keyword(s):  
Triticum Aestivum ◽  
Regression Analysis ◽  
Moisture Content ◽  
Spring Wheat ◽  
Triticum Aestivum L ◽  
Joint Analysis ◽  
Wheat Cultivars ◽  
Moisture Contents ◽  
Wide Range

This study was undertaken to determine if the spike moisture content of ripening spring wheat (Triticum aestivum L. em. Thell.) could provide an accurate measure of kernel moisture content and whether spike moisture content could also substitute for days to ripe in evaluating the relative maturity of spring wheat cultivars. Starting with a large, unreplicated observation nursery, 65 plots were selected to represent a wide range in relative maturity and all parts of the nursery. Spike moisture content and kernel moisture content were determined for each plot as the earliest plots approached a kernel moisture content of about 20% while the latest were at about 50%. Joint analysis of these two variables (regression analysis and other procedures) showed that across this wide range of relative maturity, moisture contents of entire spikes gave virtually the same result as did a measurement of the moisture content of the kernels. This was true for wheats both with and without awns. In replicated cultivar trials, spike moisture content as the earliest cultivars approached maturity had similar normalized errors and was as closely correlated with yield as was days to ripe. Spike moisture content therefore appears suitable for use in the evaluation of relative maturity of different wheat cultivars.Key words: Kernel moisture, maturity, earliness, yield

INHERITANCE OF SEED COAT COLOR IN EIGHT SPRING WHEAT CULTIVARS

1981 ◽  
Vol 61 (3) ◽  
pp. 719-721 ◽  
Author(s):  
R. J. BAKER
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Seed Coat ◽  
Coat Color ◽  
Single Gene ◽  
Triticum Aestivum L ◽  
Seed Coat Color ◽  
Wheat Cultivars

Segregation for seed coat color was studied in F2 populations of crosses between eight red-seeded and three white-seeded cultivars of spring wheat (Triticum aestivum L. em Thell). Red Bobs and Pitic 62 each possessed a single gene for red seed coat color; Glenlea and NB320 each carried two genes; Neepawa, Park and RL4137 each possessed three genes. Data for crosses with Manitou were not sufficient to distinguish between the presence of two or three genes for seed coat color in this cultivar.

CRUSHING OF SWATHED STEMS TO IMPROVE FIELD DRYING OF CEREAL CROPS

1987 ◽  
Vol 67 (3) ◽  
pp. 637-644
Author(s):  
P. A. VERSAVEL ◽  
W. E. MUIR
Keyword(s):  
Triticum Aestivum ◽  
Moisture Content ◽  
Triticum Aestivum L ◽  
Cereal Crops ◽  
Drying Rate ◽  
Moisture Contents ◽  
Fresh Cut

Spikes severed from the stem and stems crushed just below the attached spike were compared with untreated stems to determine if the drying rate of windrowed cereal crops could be increased. Moisture content of stems and unthreshed spikes were measured while crop material was dried under room conditions. Fresh cut immature and physiologically mature material, and rewetted crop material were examined in the laboratory. The stems of immature field material dried faster when crushed than un-crushed while the attached spikes showed no difference in drying rate. Crushed stems of both fresh and rewetted crop material at high initial moisture contents dried faster than uncrushed stems. Severed spikes dried faster than spikes attached to the stems. Spikes attached to crushed and uncrushed stems showed no difference in drying rate. Crushed stems gained moisture 58% faster than untreated stems. A windrower designed to crush straw stems could reduce straw moisture content significantly and reduce power requirements for the threshing mechanism. The benefit would be reduced or eliminated if rewetting conditions occurred.Key words: Drying, stem crushing, wheat, barley, Triticum aestivum L.

EFFECT OF SEEDING RATE ON GRAIN YIELD, STRAW YIELD AND HARVEST INDEX OF EIGHT SPRING WHEAT CULTIVARS

1982 ◽  
Vol 62 (2) ◽  
pp. 285-291 ◽  
Author(s):  
R. J. BAKER
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Spring Wheat ◽  
Linear Response ◽  
Harvest Index ◽  
Triticum Aestivum L ◽  
Wheat Cultivars ◽  
Seeding Rate ◽  
Straw Yield ◽  
Rate Interaction

Eight cultivars of spring wheat, Triticum aestivum L., were evaluated at seeding rates of 110, 270 and 430 seeds/m2 in a total of nine experiments spanning three locations, two dates of seeding and 2 yr. Grain yield exhibited a significant cultivar × experiment × linear response to seeding rate interaction. Grain yield of Pitic 62 showed a significant decrease with increased seeding rate in one experiment while giving the greatest increase in another. Over all experiments, the highest seeding rate gave the highest grain yield. For straw yield, Chester showed the greatest response to seed rate, Canuck the least. With the exception of Canuck, which showed a significant increase in harvest index with increased seeding rate, harvest index tended to be greater at the intermediate seeding rate.

YIELD OF PURE AND MIXED STANDS OF TWO SPRING WHEAT CULTIVARS SOWN AT FIVE RATES OF SEEDING

1977 ◽  
Vol 57 (3) ◽  
pp. 1005-1007 ◽  
Author(s):  
R. J. BAKER
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Yield Components ◽  
Triticum Aestivum L ◽  
Pure Stand ◽  
Wheat Cultivars ◽  
Seeding Rate ◽  
Mixed Stands ◽  
Yield And Yield Components

Yield and yield components were measured on two spring wheat (Triticum aestivum L. em Thell) cultivars, Neepawa and Pitic 62, and a 1:1 mixture of the two sown at five rates of seeding in each of 2 yr. Lack of agreement between performance in pure and mixed stands was observed when, at the highest seeding rate, the mixture yielded higher in 1974 and lower in 1976 than either of the component cultivars grown in pure stand.

Chromosomes in 'Cadet' and 'Rescue' wheats carrying loci for cold hardiness and vernalization response

1986 ◽  
Vol 28 (6) ◽  
pp. 991-997 ◽  
Author(s):  
D. W. A. Roberts
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Cold Hardiness ◽  
Rank Order ◽  
Triticum Aestivum L ◽  
Wheat Cultivars ◽  
Chromosome Substitution ◽  
Vernalization Response ◽  
Substitution Lines ◽  
Chromosome Substitution Lines

'Rescue', 'Cadet', and the 42 reciprocal chromosome substitution lines derived from these two spring wheat cultivars were tested for vernalization response and cold hardiness. Cold hardiness was tested after hardening under a 16-h day for 8 weeks with 6 °C day and 4 °C night temperatures or in the dark for 7 weeks at 0.8 °C followed by 8 weeks at −5 °C. Chromosomes 5A, 5B, 7B, and possibly 2A carried loci for vernalization response. Chromosomes 2A, 5A, and 5B carried loci affecting cold hardiness measured after 8 weeks in the light at 6 °C during the day and 4 °C at night, whereas chromosomes 6A, 3B, 5B, and 5D were involved in cold hardiness after hardening in the dark at 0.8 °C followed by −5 °C. The results suggest that the rank order of cultivars for cold hardiness depends on the hardening technique used since the two different techniques tested had different genetic and presumably somewhat different biochemical bases.Key words: Triticum aestivum L., cold hardiness, vernalization.

EFFECT OF HERBICIDES ON SEEDLING GROWTH, HEAD DEFORMATION AND GRAIN YIELD OF SPRING WHEAT CULTIVARS

1984 ◽  
Vol 64 (1) ◽  
pp. 25-30 ◽  
Author(s):  
J. A. IVANY ◽  
H. G. NASS
Keyword(s):  
Adverse Effect ◽  
Triticum Aestivum ◽  
Grain Yield ◽  
Spring Wheat ◽  
Field Experiments ◽  
Triticum Aestivum L ◽  
The Other ◽  
Wheat Cultivars ◽  
Plant Weight ◽  
Herbicide Treatment

In field experiments at Charlottetown, P.E.I., five herbicides evaluated at two rates of application on eight spring wheat (Triticum aestivum L.) cultivars showed no effect on dry plant weight 20 days after treatment. Herbicide treatment with dicamba resulted in a greater number of deformed heads per plot compared with the untreated in 1980 and with all herbicides except diclofop-methyl in 1981. More deformed heads occurred with dicamba and the 2,4-D/mecoprop/dicamba mixture at the higher rate of application in 1981 than with the other herbicides and the lower rate of application. All cultivars had more deformed heads than the untreated control when treated with 2,4-D, dicamba and the 2,4-D/mecoprop/dicamba mixture in 1981. Neepawa and Dundas had more deformed heads than the other cultivars when treated with MCPA. Head deformation by herbicide treatment had no adverse effect on grain yield in this study.Key words: Spring wheat cultivars, herbicides, head deformation, 2,4-D, MCPA, dicamba, diclofop-methyl

Infinity hard red spring wheat

2006 ◽  
Vol 86 (3) ◽  
pp. 737-742 ◽  
Author(s):  
R. M. DePauw ◽  
R. E. Knox ◽  
F. R. Clarke ◽  
T. N. McCaig ◽  
J. M. Clarke ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Spring Wheat ◽  
Triticum Aestivum L ◽  
Advisory Council ◽  
Grain Protein ◽  
Head Blight ◽  
Hard Red Spring Wheat ◽  
Wide Range ◽  
Moderate Resistance

Infinity hard red spring wheat (Triticum aestivum L.) has exhibited adaptation to a wide range of growing season temperatures and moisture availability. Infinity averaged significantly more grain yield than most other presently registered cultivars, and its grain protein concentration was significantly higher than that of Superb in the Saskatchewan Advisory Council trials. It matured significantly earlier than Superb. The straw length and strength, and volume weight of Infinity was intermediate to the check cultivars. Its seed size was smaller than that of AC Barrie and Superb. Infinity expressed resistance to prevalent races of stem rust and loose smut, moderate resistance to leaf rust and common bunt, and susceptibility to fusarium head blight. Infinity is eligible for all grades of the Canada Western Red Spring (CWRS) wheat class. Key words: Triticum aestivum L., cultivar description, adaptation, grain yield, grain protein, disease resistance

EFFECT OF HARVEST TIME AND DRYING METHOD ON THE YIELD, QUALITY AND GRADE OF HARD RED SPRING WHEAT IN NORTHWEST ALBERTA

1984 ◽  
Vol 64 (3) ◽  
pp. 617-623
Author(s):  
J. V. CHRISTENSEN ◽  
W. G. LEGGE
Keyword(s):  
Triticum Aestivum ◽  
Moisture Content ◽  
Spring Wheat ◽  
Triticum Aestivum L ◽  
Kernel Weight ◽  
Test Weight ◽  
Drying Method ◽  
Falling Number ◽  
Current Recommendation ◽  
Hard Red Spring Wheat

Two hard red spring wheat (Triticum aestivum L.) cultivars, Neepawa and Columbus, were harvested at 5% kernel moisture content (KMC) intervals from 45% to 15% for three growing seasons. Two drying treatments, field drying in windrows and oven drying were evaluated. Yield, test weight, 1000-kernel weight, protein-N, falling number and commercial grade were determined. Protein-N and 1000-kernel weight were reduced when the crop was harvested above 40% and 35% KMC, respectively, but were not affected by drying method. Yield losses up to 12% were recorded with windrowing. Windrowing at 35% KMC or less in warm, dry conditions had little effect on test weight, falling numbers, and grade. Under wet conditions, windrowing above 20% KMC resulted in lower falling numbers and a loss of grade. Direct combining and artificial drying above 20% KMC lowered test weights, falling numbers and grade. The current recommendation of windrowing at 35% KMC is supported under good harvest conditions but either windrowing or straight combining at 20% KMC would be superior under damp harvest conditions.Key words: Triticum aestivum L., kernel moisture content, drying method, falling number, quality, grade

THE GENETICS OF YIELD IN SPRING WHEAT (TRITICUM AESTIVUM L.)

1971 ◽  
Vol 13 (1) ◽  
pp. 110-114 ◽  
Author(s):  
P. D. Walton
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Genetic Variance ◽  
Developmental Stages ◽  
Flag Leaf ◽  
Additive Genetic Variance ◽  
Diallel Cross ◽  
Triticum Aestivum L ◽  
Morphological Characters ◽  
Wheat Cultivars

A diallel cross among eight spring wheat cultivars examined the inheritance of yield, its components, certain developmental stages and morphological characters above the flag leaf node. Additive genetic variance was important for all the characters studied. For yield, kernels per ear, ear volume and for the developmental stages considered dominance was also present. Results presented here agreed with the main conclusions drawn in four other diallels crosses which were reported previously.

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