THE GENIC BASIS FOR DIFFERENCES IN SEDIMENTATION VALUE AND PROTEIN CONTENT BETWEEN TWO CULTIVARS OF TRITICUM AESTIVUM

1975 ◽  
Vol 17 (3) ◽  
pp. 433-439 ◽  
Author(s):  
K. K. Wu ◽  
F. W. Sosulski ◽  
C. F. Wehrhahn
Keyword(s):  
Triticum Aestivum ◽  
Genetic Variation ◽  
Protein Content ◽  
Genetic Relationship ◽  
Wheat Cultivars ◽  
Major Genes ◽  
Inbred Backcross Lines ◽  
Present Technique ◽  
Sedimentation Value ◽  
Inbred Backcross

Genie analysis was used to study the inheritance of sedimentation value and protein content in two sets of reciprocal inbred backcross lines. Three loci containing genes with major effects were responsible for most of the differences in sedimentation value between two wheat cultivars, Baart and Ramona, grown in two years. These loci accounted for 84% to 93% of genetic variation, while environmental variances were relatively low. However, the differences in protein content between the two parents were too small for the present technique to detect the presence of any major genes. No genetic relationship was found between protein content and sedimentation value.

Environmental and genetic variation for protein content in winter wheat (Triticum aestivum L.)

Euphytica ◽  
1979 ◽  
Vol 28 (2) ◽  
pp. 209-218 ◽  
Author(s):  
Th. Kramer
Keyword(s):  
Triticum Aestivum ◽  
Genetic Variation ◽  
Winter Wheat ◽  
Protein Content ◽  
Triticum Aestivum L

Variation and Evaluation of Mixing Tolerance, Protein Content, and Sedimentation Value in Early Generations of Spring Wheat, Triticum aestivum L. 1

Crop Science ◽  
1964 ◽  
Vol 4 (2) ◽  
pp. 171-174 ◽  
Author(s):  
K. L. Lebsock ◽  
C. C. Fifield ◽  
Georgia M. Gurney ◽  
W. T. Greenaway
Keyword(s):  
Triticum Aestivum ◽  
Protein Content ◽  
Spring Wheat ◽  
Triticum Aestivum L ◽  
Sedimentation Value

scholarly journals Linkage Analysis of Molecular Markers and Quantitative Trait Loci in Populations of Inbred Backcross Lines of Brassica napus L.

Genetics ◽  
1999 ◽  
Vol 153 (2) ◽  
pp. 949-964 ◽  
Author(s):  
David V Butruille ◽  
Raymond P Guries ◽  
Thomas C Osborn
Keyword(s):  
Genetic Variation ◽  
Brassica Napus ◽  
Quantitative Trait Loci ◽  
Qtl Analysis ◽  
Quantitative Trait ◽  
Agronomic Traits ◽  
Pedigree Structure ◽  
Inbred Backcross Lines ◽  
Trait Loci ◽  
Inbred Backcross

Abstract Backcross populations are often used to study quantitative trait loci (QTL) after they are initially discovered in balanced populations, such as F2, BC1, or recombinant inbreds. While the latter are more powerful for mapping marker loci, the former have the reduced background genetic variation necessary for more precise estimation of QTL effects. Many populations of inbred backcross lines (IBLs) have been developed in plant and animal systems to permit simultaneous study and dissection of quantitative genetic variation introgressed from one source to another. Such populations have a genetic structure that can be used for linkage estimation and discovery of QTL. In this study, four populations of IBLs of oilseed Brassica napus were developed and analyzed to map genomic regions from the donor parent (a winter-type cultivar) that affect agronomic traits in spring-type inbreds and hybrids. Restriction fragment length polymorphisms (RFLPs) identified among the IBLs were used to calculate two-point recombination fractions and LOD scores through grid searches. This information allowed the enrichment of a composite genetic map of B. napus with 72 new RFLP loci. The selfed and hybrid progenies of the IBLs were evaluated during two growing seasons for several agronomic traits. Both pedigree structure and map information were incorporated into the QTL analysis by using a regression approach. The number of QTL detected for each trait and the number of effective factors calculated by using biometrical methods were of similar magnitude. Populations of IBLs were shown to be valuable for both marker mapping and QTL analysis.

Genetic analysis of the avirulence of wheatgrass powdery mildew fungus on common wheat

Genome ◽  
1989 ◽  
Vol 32 (5) ◽  
pp. 913-917 ◽  
Author(s):  
Y. Tosa
Keyword(s):  
Triticum Aestivum ◽  
Powdery Mildew ◽  
Genetic Analysis ◽  
Common Wheat ◽  
Erysiphe Graminis ◽  
Wheat Cultivars ◽  
Avirulence Genes ◽  
Powdery Mildew Fungus ◽  
Major Genes ◽  
Formae Speciales

F1 hybrid cultures between Erysiphe graminis f.sp. agropyri (wheatgrass mildew fungus) and E. graminis f.sp. tritici (wheat mildew fungus) were produced by using a common host of the two formae spéciales. When three common wheat cultivars, Triticum aestivum cv. Norin 4, T. aestivum cv. Norin 10, and T. compactum cv. No. 44, were inoculated with a population of F1 cultures, avirulent and virulent cultures segregated in a 3:1 ratio. This indicated that two major genes are involved in the avirulence of E. graminis f.sp. agropyri, Ak-1, on each of the three cultivars. Further analyses revealed that the three pairs of avirulence genes have one gene in common. On T. aestivum cv. Shin-chunaga, T. aestivum cv. Norin 26, and a strain of T. macha, the F1 population segregated in the same pattern as on T. aestivum cv. Norin 4, indicating that the same pair of avirulence genes is operating on these four cultivars. On T. aestivum cv. Red Egyptian the distribution of F1 phenotypes was continuous, suggesting that no major genes are involved in the avirulence of Ak-1 on this cultivar.Key words: powdery mildew, Erysiphe graminis, avirulence, wheat, wheatgrass.

THE GENETIC BASIS FOR THE DIFFERENCE IN SEED WEIGHT BETWEEN THATCHER AND SELKIRK WHEATS

1972 ◽  
Vol 14 (3) ◽  
pp. 667-673 ◽  
Author(s):  
B. S. Talukdar
Keyword(s):  
Spring Wheat ◽  
Seed Weight ◽  
Genetic Basis ◽  
Wheat Cultivars ◽  
Major Genes ◽  
Hard Red Spring Wheat ◽  
Line Method ◽  
Backcross Line ◽  
The Difference ◽  
Inbred Backcross

The inbred backcross line method was used to study the genetics of the difference in seed weight between two hard red spring wheat cultivars, Thatcher and Selkirk. Three major genes, one with large and two with relatively small but equal effects, were found to control the difference. The distribution of the alleles was unidirectional with Thatcher carrying the alleles for light and Selkirk carrying the alleles for heavy seed. Linkage, dominance, and epistasis caused practically no bias in the analysis. The result indicates that breeding for seed weight should be simple.

EFFECTS OF NITROGEN FERTILIZER ON THE YIELD AND PROTEIN CONTENT OF FIVE SPRING WHEATS

1974 ◽  
Vol 54 (1) ◽  
pp. 1-7 ◽  
Author(s):  
D. R. KNOTT
Keyword(s):  
Triticum Aestivum ◽  
Protein Content ◽  
Nitrogen Fertilizer ◽  
Triticum Aestivum L ◽  
Yield Response ◽  
Wheat Cultivars ◽  
Complex Interactions ◽  
Protein Response

Six tests were run in 1970 and 1971 to measure the yield and protein response of five diverse wheat cultivars (Triticum aestivum L.) to fertilizer treatments and particularly to nitrogen. The results indicate that complex interactions occur between cultivars, locations, and fertilizer treatments. Of the five cultivars, Pitic 62 and Era showed little yield response to the treatments used but gave the largest increases in protein content. Inia 66 and W.S. 1809 gave the largest increases in yield but showed little increase in protein content. Neepawa gave intermediate responses in both yield and protein content. In general, the heaviest applications of fertilizer did not produce significant increases in yield beyond those produced by the lower applications.

scholarly journals Genetic Variation for Protein Content and Yield-Related Traits in a Durum Population Derived From an Inter-Specific Cross Between Hexaploid and Tetraploid Wheat Cultivars

2019 ◽  
Vol 10 ◽  
Author(s):  
Angelica Giancaspro ◽  
Stefania L. Giove ◽  
Silvana A. Zacheo ◽  
Antonio Blanco ◽  
Agata Gadaleta
Keyword(s):  
Genetic Variation ◽  
Protein Content ◽  
Tetraploid Wheat ◽  
Wheat Cultivars

EVALUATION OF THE INBRED–BACKCROSS METHOD FOR STUDYING THE GENETICS OF CONTINUOUS VARIATION

1978 ◽  
Vol 58 (1) ◽  
pp. 7-12 ◽  
Author(s):  
R. J. BAKER
Keyword(s):  
Spring Wheat ◽  
Quantitative Traits ◽  
Kernel Weight ◽  
Continuous Variation ◽  
Major Genes ◽  
Inbred Backcross Lines ◽  
Weight Data ◽  
Inbred Backcross

The inheritance of kernels per spike was studied in 73 inbred–backcross lines from the second backcross of Pitic 62 spring wheat to Neepawa. Data from two four-replicate experiments failed to show any evidence of influence by major genes. Similarly, kernel weight data from 91 inbred–backcross lines from the second backcross of Glenlea to Neepawa failed to show any influence of major genes. It is suggested that the inbred–backcross technique of Wehrhahn and Allard (1965) is of limited value in studying the genetics of quantitative traits except where the distribution of line performances is discontinuous.

The inheritance of genetic variation in Triticum speltoides affecting heterogenetic chromosome pairing in hybrids with Triticum aestivum

1984 ◽  
Vol 26 (3) ◽  
pp. 279-287 ◽  
Author(s):  
K. C. Chen ◽  
J. Dvořák
Keyword(s):  
Triticum Aestivum ◽  
Genetic Variation ◽  
Chromosome Pairing ◽  
Major Gene ◽  
Diploid Species ◽  
Duplicate Gene ◽  
The Other ◽  
Major Genes ◽  
Minor Genes

Triticum speltoides (Tausch) Gren. ex Richter plants which differed in the ability to promote heterogenetic chromosome pairing in hybrids T. aestivum L. × T. speltoides were crossed and a single F1 plant from each cross was hybridized with T. aestivum. The segregation among the hybrids for mean number of chiasmata per cell showed that two gene systems in T. speltoides genotypes were involved in the promotion of heterogenetic pairing. One system was composed of two duplicate gene loci segregating independently of each other. Variation at these loci determined two basic levels of heterogenetic pairing. The other system was composed of several minor genes extensively modifying the effects of the major genes. The minor genes interacted mostly in an additive fashion. Triticum speltoides inbred plants were then crossed with diploid species. T. tauschii (Coss.) Schmal and T. dichasians (Zhuk.) Bowden. Consistent differences in the levels of chromosome pairing were found in these hybrids. However, this variation in chromosome pairing did not coincide with the variation at the major gene loci. This indicated that the major genes were ineffective in the diploid hybrids.Key words: Triticum, pairing regulation, homeologous pairing, heterogenetic pairing.

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