Quantitative Trait Loci Analysis of Seed Quality Characteristics in Lentil using Single Nucleotide Polymorphism Markers
Publication Overview
Abstract Seed shape, color, and pattern of lentil (Lens culinaris Medik.
subsp. culinaris) are important quality traits as they determine
market class and possible end uses. A recombinant inbred
line population was phenotyped for seed dimensions over
multiple site–years and classified according to cotyledon and
seed coat color and pattern. The objectives were to determine
the heritability of seed dimensions, identify genomic regions
controlling these dimensions, and map seed coat and cotyledon
color genes. A genetic linkage map consisting of 563 single
nucleotide polymorphisms, 10 simple sequence repeats, and
four seed color loci was developed for quantitative trait loci
(QTL) analysis. Loci for seed coat color and pattern mapped to
linkage groups 2 (Ggc), 3 (Tgc), and 6 (Scp) while the cotyledon
color locus (Yc) mapped to linkage group 1. The broad sense
heritability estimates were high for seed diameter (broad-sense
heritability [H2] = 0.92) and seed plumpness (H2 = 0.94) while
seed thickness (H2 = 0.60) and days to flowering (H2 = 0.45)
were more moderate. There were significant seed dimension
QTL on six of the seven linkage groups. The most significant
QTL for diameter and plumpness was found at the cotyledon
color locus (Yc). The markers identified in this study can be used
to help enrich breeding populations for desired seed quality
characteristics, thereby increasing efficiency in the lentil breeding
program.
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