Abstract:
:Bacterial wilt, caused by Ralstonia solanacearum, is a devastating disease affecting over 350 plant species. A few peanut cultivars were found to possess stable and durable bacterial wilt resistance (BWR). Genomics-assisted breeding can accelerate the process of developing resistant cultivars by using diagnostic markers. Here, we deployed sequencing-based trait mapping approach, QTL-seq, to discover genomic regions, candidate genes and diagnostic markers for BWR in a recombination inbred line population (195 progenies) of peanut. The QTL-seq analysis identified one candidate genomic region on chromosome B02 significantly associated with BWR. Mapping of newly developed single nucleotide polymorphism (SNP) markers narrowed down the region to 2.07 Mb and confirmed its major effects and stable expressions across three environments. This candidate genomic region had 49 nonsynonymous SNPs affecting 19 putative candidate genes including seven putative resistance genes (R-genes). Two diagnostic markers were successfully validated in diverse breeding lines and cultivars and could be deployed in genomics-assisted breeding of varieties with enhanced BWR.
journal_name
Plant Biotechnol Jjournal_title
Plant biotechnology journalauthors
Luo H,Pandey MK,Khan AW,Wu B,Guo J,Ren X,Zhou X,Chen Y,Chen W,Huang L,Liu N,Lei Y,Liao B,Varshney RK,Jiang Hdoi
10.1111/pbi.13153subject
Has Abstractpub_date
2019-12-01 00:00:00pages
2356-2369issue
12eissn
1467-7644issn
1467-7652journal_volume
17pub_type
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