Discovery of the Genomic Region and Candidate Genes of the Scarlet Red Flesh Color (Yscr ) Locus in Watermelon (Citrullus Lanatus L.)

Frontiers in Plant Science
Na LiShuangwu Ma

Abstract

The flesh color of watermelon (Citrullus lanatus) is an important fruit quality trait that helps to determine fruit attractiveness and is potentially beneficial to human health. Previous inheritance analyses determined that a single dominant gene, Yscr , produces the scarlet red flesh color rather than the coral red flesh color in watermelon. However, no genomic region or gene-based molecular markers for the locus Yscr have been reported thus far. In the present study, two high-density genetic maps and whole-genome variation detection aided by genome resequencing were first map the flesh color locus Yscr to a small region on chromosome 6 based on two independent populations derived from two scarlet red-fleshed lines and two coral red-fleshed lines. Two major quantitative trait loci located in the same genomic regions were identified in the F2 and BC1P2 populations and explained 90.36% and 75.1% of the phenotypic variation in flesh color, respectively. Based on the genetic variation in the two parental lines, newly developed PCR-based markers narrowed the Yscr region to 40 Kb. Of the five putative genes in this region, four encoded glycine-rich cell wall structural proteins, which implied that a new regulatory mechanism might oc...Continue Reading

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Citations

Oct 12, 2021·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·Shi LiuQian Zhang

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Datasets Mentioned

BETA
NY0016
FJ998047

Methods Mentioned

BETA
Illumina sequencing
PCR

Software Mentioned

SAS
R
R \ qtlbim
Perl
Primer
Oligo
JoinMap
SEG
\ qtlbim
SignalP

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