A genetic study of cold resistance in wheat

Law, C. N.; Jenkins, G.

doi:10.1017/s001667230000152x

Cited by 48 publications

(25 citation statements)

References 13 publications

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“…This multi-locus model for FTA/FTB is consistent with studies of winter wheat which concluded there was polygenic inheritance of winter hardiness [11,20,33,41,42]. Freezing tolerance was reported to be controlled by a few genes in diploid Solanum species [40].…”

Section: Fta2 Ftb2supporting

confidence: 85%

“…Studies with winter wheat have suggested polygenic inheritance of winter hardiness [ 11,13] and several chromosomes containing genes for frost resistance have been identified using monosomic [42] or chromosome substitution [20,41] lines. Segregation in a cross of diploid Solanum species suggested that nonacclimated freezing tolerance and capacity to acclimate were controlled by only a few genes [40].…”

Section: Introductionmentioning

confidence: 99%

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Genetic analysis and mapping of genes controlling freezing tolerance in oilseedBrassica

et al. 1995

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Freezing tolerance is the ability of plants to survive subfreezing temperatures and is a major component of winter survival. In order to study the genetic regulation of freezing tolerance, an F2 population of Brassica rapa and a doubled haploid population of Brassica napus were assayed in vitro for relative freezing tolerance of acclimated and nonacclimated plants. Linkage maps developed previously were used to identify putative quantitative trait loci (QTL). Genomic regions with significant effects on freezing tolerance were not found for the B. napus population, but for B. rapa four regions were associated with acclimated freezing tolerance (FTA) and acclimation ability (FTB), and two unliked regions were associated with nonacclimated freezing tolerance (FTN). Acclimation ability was regulated by genes with very small additive effects and both positive and negative dominance effects. The allele from the winter parent at the FTN QTL had positive additive effects, but negative dominance effects. RFLP loci detected by a cold-induced and a stress-related cDNA from Arabidopsis thaliana mapped near two QTL for FTA/FTB. Further tests are needed to determine if alleles at these loci are responsible for the QTL effects we detected.

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Section: Fta2 Ftb2supporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Genetic analysis and mapping of genes controlling freezing tolerance in oilseedBrassica

et al. 1995

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“…Cold resistance, which is one factor contributing to winter-hardiness, has been shown to be influenced by the chromosomes of homoeologous group 5, and chromosomes 4D and 7A are also implicated in its control (Law and Jenkins, 1970).…”

Section: Introductionmentioning

confidence: 99%

The genetical control of cold resistance and vernalisation requirement in wheat

Cahalan

Law

1979

Heredity

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SUMMARYVernalisation response in wheat is controlled by genes located on chromosomes 5A and 5D. The variety Chinese Spring has a winter or late allele (vrnl) on chromosome 5A and a spring or early allele (Vrn3) on 5D. Increasing the dosage of the former has no significant effect on vernalisation response, but when the dosage of the latter is increased the response is reduced and flowering takes place earlier in unvernalised plants. A background of alien cytoplasm from Aegilops ovata prolongs the vegetative phase of development and also increases the vernalisation response, although to a lesser extent than chromosomal changes.The same chromosomes are involved in the control of cold resistance.Alleles on 5A and 5D of Chinese Spring condition poor tolerance to low temperatures, while those on 5A of Cheyenne and 5D of Hope confer a higher degree of resistance. Cytoplasmic as well as chroniosomal factors play an important part in determining the level of resistance of difference genotypes.Within the group of genotypes studied, there is no statistically significant relationship between vernalisation response and resistance to freezing to temperatures of -6°and -12°C, so that in spite of the fact that chromosomes of of homoeologous group 5 are implicated in the control of both vernalisation requirement and cold resistance there is no evidence that the characters are determined by the same genetic factors.

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“…It is clear from previous studies that a number of chromosomes are responsible for the differences between varieties, so that frost resistance can be regarded as polygenie (LAW & JENKINS, 1970;JENKINS, 1971;SUTKA & RAJKI, 1978PUCHKOV & ZHIROV, 1978;SUTKA, 198 1, 1984a). However, a major proportion of the variation is associated with chromosomes of the homoeologous group 5.…”

Section: Introductionmentioning

confidence: 99%