Drought is the major constraint to chickpea productivity worldwide. Utilizing early flowering genotypes and larger seed size have been suggested as strategies for breeding in drought zones. Therefore, this study aimed to identify potential markers linked to days-to-flowering, 100-seed weight, and plant height in a chickpea intraspecific F(2:3) population derived from the cross ILC3279 × ICCV2. A closely linked marker (TA117) on linkage group LG3 was identified for the days-to-flowering trait, explaining 33% of the variation. In relation to plant height, a quantitative trait loci (QTL) was located in LG3, close to the Ts5 marker, that explained 29% of phenotypic variation. A QTL for 100-seed weight located in LG4, close to TA176, explained 51% of variation. The identification of a locus linked both to high 100-seed weight and days-to-flowering may account for the correlation observed between these traits in this and other breeding attempts.
Quantitative traits of seed size, plant height and days to flowering were
studied in a chickpea intraspecific F3:4 lines population derived from a
ILC3279?ILC588 cross. The lines were genotyped with random amplified
polymorphic DNA (RAPD), universal rice primer (URP) and sequence tagged
microsatellite site (STMS) markers, and a genetic map composed of 7 linkage
groups (LGs) covering 285.3 cM was constructed. Quantitative trait loci
(QTLs) for the three characters were detected in LG2, LG3 and LG4. Two QTLs
for days to flowering were detected on LG2 and LG3. These two QTLs accounted
for 58% of the total phenotypic variation for days to flowering. A QTL for
plant height was located in LG3 explaining around 42% of the variation. This
trait was shown to be under a major gene control. For 100-seed weight, a QTL
located in LG4 explained around 37% of the phenotypic variations. This
information can be used to formulate the an efficient breeding strategy for
improvement of time to flowering in short-season temperate environments,
plant height with more reproductive biomass and improved yield with bigger
seed size in chickpea.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.