INHERITANCE OF SAWFLY REACTION AND STEM SOLIDNESS IN SPRING WHEAT CROSSES: SAWFLY REACTION

1965 ◽  
Vol 45 (6) ◽  
pp. 583-589 ◽  
Author(s):  
Hugh McKenzie
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Heading Date ◽  
Triticum Aestivum L ◽  
The Other ◽  
Major Influence ◽  
Tilletia Caries ◽  
Wheat Stem Sawfly ◽  
Cephus Cinctus ◽  
Stem Solidness

Inheritance of reaction to the wheat stem sawfly, Cephus cinctus Nort., was studied in populations of F3 and B2 lines from the cross Red Bobs × C.T. 715 (Triticum aestivum L.), and the respective backcrosses. The data supported the hypothesis that the varieties differed by three genes for sawfly reaction. A major influence was attributable to one gene. Its allele for susceptibility when homozygous was epistatic to the other two genes. Its allele for resistance was twice as effective as either of the other genes in conditioning resistance. The other two genes lacked dominance and were equal in their influence on sawfly reaction.Correlation coefficients showed that sawfly reaction was not associated with reaction to race T-2 of Tilletia caries (DC.) Tul., heading date, or awnedness. Sawfly susceptibility was weakly correlated with height.

INHERITANCE OF SAWFLY REACTION AND STEM SOLIDNESS IN SPRING WHEAT CROSSES: STEM SOLIDNESS

1965 ◽  
Vol 45 (6) ◽  
pp. 591-600 ◽  
Author(s):  
Hugh McKenzie
Keyword(s):  
Triticum Aestivum ◽  
Close Association ◽  
Heading Date ◽  
Correlation Coefficients ◽  
Triticum Aestivum L ◽  
The Other ◽  
Major Influence ◽  
Homozygous Condition ◽  
Stem Solidness ◽  
Weak Negative Correlation

Inheritance of stem solidness was studied in populations of F3 and B2 lines from the Red Bobs × C.T. 715 and Redman × S-615 (Triticum aestivum L.) crosses and backcrosses. The data supported the hypothesis that the varieties in each cross differed by four genes for stem solidness. In both crosses, one gene exerted a major influence in that its allele for hollowness in the homozygous condition was epistatic to the other three genes. The other three genes within each cross were similar in their influence on solidness. Between the two crosses, corresponding genes differed in some degree.Genetic analyses and correlation coefficients both revealed a close association between sawfly resistance and stem solidness in the Red Bobs × C.T. 715 cross indicating that the stem solidness character was largely responsible for conditioning the degree of sawfly reaction in a plant.In both crosses, a weak negative correlation was found between stem solidness and height. Stem solidness was not associated with bunt (race T-2) reaction, glume color, awn type, or heading date.

INHERITANCE OF BUNT REACTION IN A REDMAN × S-615 WHEAT CROSS

1964 ◽  
Vol 44 (6) ◽  
pp. 561-567 ◽  
Author(s):  
Hugh McKenzie
Keyword(s):  
Triticum Aestivum ◽  
High Resistance ◽  
Major Gene ◽  
Heading Date ◽  
Triticum Aestivum L ◽  
Moderate Degree ◽  
Tilletia Caries ◽  
Wheat Stem Sawfly ◽  
Minor Genes ◽  
Stem Solidness

Inheritance of reaction to race T-2 of Tilletia caries (DC.) Tul. was studied in populations of F3 and B2 lines from the cross Redman × S-615 (Triticum aestivum L.) and the respective backcrosses. Redman and S-615 were found to differ by three genes for bunt reaction. Redman possesses a major gene recessive for resistance, and two minor genes. Each of the minor genes is capable of conditioning a moderate degree of resistance alone but together they are capable of conditioning high resistance as a result of geometric gene actionCorrelation coefficients show that bunt reaction to race T-2 is not associated with wheat stem sawfly (Cephus cinctus Nort.) reaction, total stem solidness, solidness in each internode, awn type, glume color, plant height, or heading date.

Survey of Wheat Stem Sawfly (Hymenoptera: Cephidae) Infesting Wheat in Eastern Colorado

2021 ◽  
Author(s):  
Darren M Cockrell ◽  
Terri Randolph ◽  
Erika Peirce ◽  
Frank B Peairs
Keyword(s):  
Triticum Aestivum ◽  
Wheat Variety ◽  
Triticum Aestivum L ◽  
The State ◽  
Economic Effects ◽  
Management Decisions ◽  
Wheat Stem Sawfly ◽  
Cephus Cinctus ◽  
Growing Region

Abstract From 2012 through 2020, a survey of wheat stem sawfly, Cephus cinctus Norton, was conducted in wheat (Triticum aestivum L.) fields in Eastern Colorado. In 2013, results showed sawfly infestations concentrated in the northern part of the state with only a few highly infested sites, with 38 of the 94 sampled sites having any infestation (five of which had >50% infestation levels). By 2020 sawfly had been found in all eastern counties sampled, and 72 of the 106 sites sampled were found to contain sawfly (11 of which had >50% infestation levels). The spread of this pest across the Colorado wheat-growing region will have lasting economic effects. The information gathered from this and future surveys will inform wheat variety development and aid in management decisions made by growers across the state.

AC Abbey hard red spring wheat

2000 ◽  
Vol 80 (1) ◽  
pp. 123-127 ◽  
Author(s):  
R. M. DePauw ◽  
J. M. Clarke ◽  
R. E. Knox ◽  
M. R. Fernandez ◽  
T. N. McCaig ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Stem Rust ◽  
Wheat Yield ◽  
Triticum Aestivum L ◽  
Common Bunt ◽  
Canadian Prairies ◽  
Wheat Stem Sawfly ◽  
Hard Red Spring Wheat ◽  
Moderate Resistance

AC Abbey, hard red spring wheat (Triticum aestivum L.), is adapted to the Canadian prairies. It is significantly shorter than any of the check cultivars and has solid stems. AC Abbey expressed higher grain yield, earlier maturity, and heavier kernels than AC Eatonia, the solidstem check cultivar. It is resistant to the wheat stem sawfly (Cephus cinctus Nort.) and to prevalent races of common bunt and has moderate resistance to leaf rust and stem rust. AC Abbey is eligible for grades of Canada Western Red Spring wheat. Key words: Triticum aestivum L., red spring wheat, yield, wheat stem sawfly, plant height, maturity

Lillian hard red spring wheat

2005 ◽  
Vol 85 (2) ◽  
pp. 397-401 ◽  
Author(s):  
R. M. DePauw ◽  
T. F. Townley-Smith ◽  
G. Humphreys ◽  
R. E. Knox ◽  
F. R. Clarke ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Grain Yield ◽  
Spring Wheat ◽  
Protein Concentration ◽  
Triticum Aestivum L ◽  
Canadian Prairies ◽  
Wheat Stem Sawfly ◽  
Hard Red Spring Wheat ◽  
Protein Resistance ◽  
Cultivar Description

Lillian, hard red spring wheat (Triticum aestivum L.), exhibited reduced cutting by the wheat stem sawfly (Cephus cinctus Nort.) and is adapted to the Canadian prairies. Lillian produced significantly more grain yield than AC Abbey and Neepawa and its grain yield and protein concentration were similar to AC Barrie. It matured significantly earlier than Superb and Laura, and had improved resistance to leaf rust and leaf spotting diseases compared to AC Abbey. Lillian is eligible for all grades of the Canada Western Red Spring (CWRS) wheat class. Key words: Triticum aestivum L., cultivar description, grain yield and protein, resistance wheat stem sawfly, leaf and stem rust

THE EFFECT OF A GENE FOR SEMIDWARFISM (Rht1) ON VARIOUS CHARACTERS IN A SPRING WHEAT CROSS

1986 ◽  
Vol 66 (3) ◽  
pp. 529-533 ◽  
Author(s):  
J. E. BRANDLE ◽  
D. R. KNOTT
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Yield Components ◽  
Triticum Aestivum L ◽  
The Other ◽  
Lower Weight ◽  
Rainfed Conditions ◽  
Percent Increase ◽  
Positive Correlations ◽  
Wheat Cross

Sixty-four F2-derived F4 lines were produced from a cross between the semidwarf wheat (Triticum aestivum L.) cultivar CSP-44 (Condor sib, Rht1) and the tall cultivar Glenlea (rht1). Thirty-two homozygous tall lines and thirty-two homozygous short lines were tested at Saskatoon under rainfed conditions in 1982 and both rainfed and irrigated conditions in 1983. The objective was to determine the effects of the gene for demidwarfism on yield and other characters under Saskatchewan conditions. The semidwarf lines consistently had more spikes per metre of row and more kernels per spike, but a lower weight per kernel. The percent increase in the number of kernels per spike for the semidwarfs compared to the tails varied more in different environments than the change in the other two components of yield. As a result, the semidwarf lines outyielded the tall lines by 13.1% in the 1982 rainfed test and by 4.1% in the 1983 irrigated test but yielded 2.7% less in the 1983 rainfed test. In general, yield showed only low positive correlations with the yield components, while the yield components showed relatively low negative correlations among themselves.Key words: Wheat, Triticum aestivum, height, semidwarfs, yield components

AC Taber red spring wheat

1992 ◽  
Vol 72 (4) ◽  
pp. 1241-1245 ◽  
Author(s):  
R. E. Knox ◽  
R. M. De Pauw ◽  
T. N. McCaig ◽  
J. M. Clarke ◽  
J. G. McLeod ◽  
...  
Keyword(s):  
Triticum Aestivum ◽  
Spring Wheat ◽  
Triticum Aestivum L ◽  
High Yield ◽  
Gluten Strength ◽  
Common Bunt ◽  
Tilletia Caries ◽  
Milling Quality ◽  
Tilletia Laevis ◽  
Cultivar Description

AC Taber, red-kernelled spring wheat (Triticum aestivum L.), resembles Biggar but has improved resistance to prevalent races of leaf rust (caused by Puccinia recondita Roberge ex Desmaz.) and common bunt [caused by Tilletia laevis Kuhn in Rabenh. and Tilletia caries (DC.) Tul. & C. Tul.]. AC Taber also has a higher protein content, better milling quality and more gluten strength than Biggar. AC Tabor is eligible for grades of the Canada Prairie Spring (red) wheat class.Key words: Triticum aestivum L., cultivar description, disease resistance, high yield

LANCER HARD RED SPRING WHEAT

1986 ◽  
Vol 66 (2) ◽  
pp. 409-412 ◽  
Author(s):  
R. M. DE PAUW ◽  
T. F. TOWNLEY-SMITH ◽  
J. M. CLARKE ◽  
T. N. McCAIG ◽  
D. S. McBEAN
Keyword(s):  
Spring Wheat ◽  
Bipolaris Sorokiniana ◽  
Triticum Aestivum L ◽  
Research Station ◽  
Seed Shattering ◽  
Wheat Stem Sawfly ◽  
Hard Red Spring Wheat ◽  
Stem Solidness ◽  
Breeder Seed ◽  
High Level

Lancer hard red spring wheat (Triticum aestivum L.) combines a high level of stem solidness which confers resistance to wheat stem sawfly (Cephus cinctus Nort.) with improved resistance to common root rot (Bipolaris sorokiniana (Sacc. in Sorok.) Shoem.) and seed shattering. It is adapted to the Brown and Dark Brown soil zones of Alberta and Saskatchewan and should be a suitable replacement for Canuck. It was licensed on 15 May 1985. Breeder seed of Lancer will be maintained by Agriculture Canada Research Station, Regina, Saskatchewan.Key words: Wheat (spring), cultivar decription

SAWFLY RESISTANCE IN WHEAT: II. DIFFERENCES BETWEEN WHEAT GROWN IN THE GREENHOUSE AND ON IRRIGATED LAND

1957 ◽  
Vol 37 (3) ◽  
pp. 292-299 ◽  
Author(s):  
D. W. A. Roberts
Keyword(s):  
The Other ◽  
Dry Land ◽  
Wheat Stem Sawfly ◽  
Cephus Cinctus ◽  
Variable Resistance ◽  
Lower Resistance ◽  
Stem Solidness ◽  
Golden Ball

The resistance of seven varieties of wheat to the wheat stem sawfly (Cephus cinctus Nort.) was tested in the greenhouse and on irrigated plots. In five of the seven varieties tested, namely, Rescue, H46146, Golden Ball, Red Bobs and Thatcher, the percentage of infested stems that were cut by sawflies was significantly higher in plants grown in the greenhouse in either summer or winter than in plants grown under irrigation in the field. In the other two varieties, H4191 and Melanopus, results were similar but the differences were not significant. This lower resistance of plants grown in the greenhouse was associated with a decrease in the percentage of tunnelled stems in which the older larvae had died. In percentage of infested stems cut, no significant differences were found between the varieties grown in the outdoor soil bins and those on adjacent irrigated land. In other 2-year tests on irrigated land, the variable resistance of wheat was apparently associated with variations in percentage of tunnelled stems in which the older larvae had died. Although stem solidness is usually associated with resistance on dry land, it appears that this characteristic alone cannot be relied on as a measure of sawfly resistance in a given variety when grown in diverse environments.

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

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