In:
Plant Biotechnology Journal, Wiley, Vol. 16, No. 11 ( 2018-11), p. 1954-1967
Kurzfassung:
Whole‐genome resequencing ( WGRS ) of mapping populations has facilitated development of high‐density genetic maps essential for fine mapping and candidate gene discovery for traits of interest in crop species. Leaf spots, including early leaf spot ( ELS ) and late leaf spot ( LLS ), and Tomato spotted wilt virus ( TSWV ) are devastating diseases in peanut causing significant yield loss. We generated WGRS data on a recombinant inbred line population, developed a SNP ‐based high‐density genetic map, and conducted fine mapping, candidate gene discovery and marker validation for ELS , LLS and TSWV . The first sequence‐based high‐density map was constructed with 8869 SNP s assigned to 20 linkage groups, representing 20 chromosomes, for the ‘T’ population (Tifrunner × GT ‐C20) with a map length of 3120 cM and an average distance of 1.45 cM. The quantitative trait locus ( QTL ) analysis using high‐density genetic map and multiple season phenotyping data identified 35 main‐effect QTL s with phenotypic variation explained ( PVE ) from 6.32% to 47.63%. Among major‐effect QTL s mapped, there were two QTL s for ELS on B05 with 47.42% PVE and B03 with 47.38% PVE , two QTL s for LLS on A05 with 47.63% and B03 with 34.03% PVE and one QTL for TSWV on B09 with 40.71% PVE . The epistasis and environment interaction analyses identified significant environmental effects on these traits. The identified QTL regions had disease resistance genes including R‐genes and transcription factors. KASP markers were developed for major QTL s and validated in the population and are ready for further deployment in genomics‐assisted breeding in peanut.
Materialart:
Online-Ressource
ISSN:
1467-7644
,
1467-7652
DOI:
10.1111/pbi.2018.16.issue-11
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2018
ZDB Id:
2136367-5
SSG:
12