Quantitative Trait Loci for Cold Tolerance in Chickpea
Publication Overview
Abstract Fall-sown chickpea (Cicer arietinum L.) yields
are often double those of spring-sown chickpea
in regions with Mediterranean climates that have
mild winters. However, winter kill can limit the
productivity of fall-sown chickpea. Developing
cold-tolerant chickpea would allow the expansion
of the current geographic range where
chickpea is grown and also improve productivity.
The objective of this study was to identify the
quantitative trait loci (QTL) associated with cold
tolerance in chickpea. An interspecific recombinant
inbred line population of 129 lines derived
from a cross between ICC 4958, a cold-sensitive
desi type (C. arietinum), and PI 489777, a coldtolerant
wild relative (C. reticulatum Ladiz), was
used in this study. The population was phenotyped
for cold tolerance in the field over four
field seasons (September 2011–March 2015)
and under controlled conditions two times. The
population was genotyped using genotypingby-
sequencing, and an interspecific genetic
linkage map consisting of 747 single nucleotide
polymorphism (SNP) markers, spanning a
distance of 393.7 cM, was developed. Three
significant QTL were found on linkage groups
(LGs) 1B, 3, and 8. The QTL on LGs 3 and 8
were consistently detected in six environments
with logarithm of odds score ranges of 5.16 to
15.11 and 5.68 to 23.96, respectively. The QTL
CT Ca-3.1 explained 7.15 to 34.6% of the phenotypic
variance in all environments, whereas QTL
CT Ca-8.1 explained 11.5 to 48.4%. The QTLassociated
SNP markers may become useful for
breeding with further fine mapping for increasing
cold tolerance in domestic chickpea.
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