Detection of quantitative trait loci on chromosome 5R of rye (Secale cereale L.)

Progenies of an F(2) mapping population were analyzed for quantitative traits to detect QTLs by using marker information from F(2) plants for chromosome 5R. The mapping population was segregating for the major dwarfing gene Ddw1 and the gene Hp1 for hairy peduncle. The only QTL determining plant hei...

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Bibliographic Details
Published in:Theoretical and applied genetics 1999-05, Vol.98 (6/7), p.1087-1090
Main Authors: Borner, A, Korzun, V, Voylokov, A.V, Weber, W.E
Format: Article
Language:English
Subjects:
agronomic traits
Barley
Chromosome mapping
Chromosomes
ddw1 gene
dominance
dwarfing
floret number
flowers
Genes
Genetic aspects
Genetic markers
hairy peduncle
height
hp1 gene
Identification and classification
inflorescences
loci
peduncle length
plant characteristics
Plant genetics
plant morphology
Quantitative trait loci
quantitative traits
recessiveness
restriction fragment length polymorphism
Rye
Secale cereale
spike length
trichomes
Triticeae
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Summary:Progenies of an F(2) mapping population were analyzed for quantitative traits to detect QTLs by using marker information from F(2) plants for chromosome 5R. The mapping population was segregating for the major dwarfing gene Ddw1 and the gene Hp1 for hairy peduncle. The only QTL determining plant height was located between HP1 and Ddw1 on the distal part of chromosome 5RL. At the same position a QTL for peduncle length was found, and this trait was closely related to plant height (r = 0.895). Since Hp1 and Ddw1 are dominant marker loci, no dominance effect could be estimated. The QTLs for spike length and the number of florets were located near the centromere on 5RL. These two traits were correlated with r = 0.824 and showed partial dominance, but these traits were not correlated to plant height and peduncle length. Homoeologous relationships between the QTLs mapped for the first time in rye and those mapped in other Triticeae members are discussed.
ISSN:0040-5752
1432-2242
DOI:10.1007/s001220051171