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Identification of genetic factors controlling kernel hardness and related traits in a recombinant inbred population derived from a soft × ‘extra-soft’ wheat (Triticum aestivum L.) cross

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Relation http://oar.icrisat.org/5520/
http://dx.doi.org/10.1007/s00122-011-1699-0
 
Title Identification of genetic factors controlling kernel hardness and related traits in a recombinant inbred population derived from a soft × ‘extra-soft’ wheat (Triticum aestivum L.) cross
 
Creator Wang , G
et al, .
 
Subject Wheat
 
Description Kernel hardness or texture, used to classify
wheat (Triticum aestivum L.) into soft and hard classes, is a
major determinant of milling and baking quality. Wheat
genotypes in the soft class that are termed ‘extra-soft’ (with
kernel hardness in the lower end of the spectrum) have
been associated with superior end-use quality. In order to
better understand the relationship between kernel hardness,
milling yield, and various agronomic traits, we performed quantitative trait mapping using a recombinant inbred line
population derived from a cross between a common soft
wheat line and a genotype classified as an ‘extra-soft’ line.
A total of 47 significant quantitative trait loci (QTL)
(LOD C 3.0) were identified for nine traits with the number
of QTL affecting each trait ranging from three to nine.
The percentage of phenotypic variance explained by these
QTL ranged from 3.7 to 50.3%. Six QTL associated with
kernel hardness and break flour yield were detected on
chromosomes 1BS, 4BS, 5BS, 2DS, 4DS, and 5DL. The
two most important QTL were mapped onto orthologous
regions on chromosomes 4DS (Xbarc1118–Rht-D1) and
4BS (Xwmc617–Rht-B1). These results indicated that the
‘extra-soft’ characteristic was not controlled by the Hardness
(Ha) locus on chromosome 5DS. QTL for eight
agronomic traits occupied two genomic regions near semidwarf
genes Rht-D1 on chromosome 4DS and Rht-B1 on
chromosome 4BS. The clustering of these QTL is either
due to the pleiotropic effects of single genes or tight
linkage of genes controlling these various traits.
 
Publisher Springer Verlag
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/5520/1/TheorApplGenet_124_207%E2%80%93221_2012.pdf
Wang , G and et al, . (2012) Identification of genetic factors controlling kernel hardness and related traits in a recombinant inbred population derived from a soft × ‘extra-soft’ wheat (Triticum aestivum L.) cross. TAG Theoretical and Applied Genetics, 124 (1). pp. 207-221. ISSN 1432-2242