Identification and genomic characterization of major effect bacterial blight resistance locus (BB-13) in Upland cotton (Gossypium hirsutum L.)

被引:8
|
作者
Gowda, S. Anjan [1 ]
Shrestha, Navin [1 ]
Harris, Taylor M. [2 ,4 ]
Phillips, Anne Z. [2 ]
Fang, Hui [1 ]
Sood, Shilpa [1 ]
Zhang, Kuang [1 ]
Bourland, Fred [3 ]
Bart, Rebecca [2 ]
Kuraparthy, Vasu [1 ]
机构
[1] North Carolina State Univ, Crop & Soil Sci Dept, Raleigh, NC 27695 USA
[2] Donald Danforth Plant Sci Ctr, 975 N Warson Rd, St Louis, MO 63132 USA
[3] Univ Arkansas, Crop Soil & Environm Sci, NE Res & Extens Ctr, Keiser, AR 72351 USA
[4] Washington Univ, Div Biol & Biomed Sci, St Louis, MO 63110 USA
基金
美国国家科学基金会;
关键词
DISEASE RESISTANCE; BLACKARM RESISTANCE; POPULATION-STRUCTURE; GENE; SOFTWARE; MAP; REGISTRATION; INHERITANCE; SEQUENCE; QUALITY;
D O I
10.1007/s00122-022-04229-2
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Key message Identification and genomic characterization of major resistance locus against cotton bacterial blight (CBB) using GWAS and linkage mapping to enable genomics-based development of durable CBB resistance and gene discovery in cotton. Cotton bacterial leaf blight (CBB), caused by Xanthomonas citri subsp. malvacearum (Xcm), has periodically been a damaging disease in the USA. Identification and deployment of genetic resistance in cotton cultivars is the most economical and efficient means of reducing crop losses due to CBB. In the current study, genome-wide association study (GWAS) of CBB resistance using an elite diversity panel of 380 accessions, genotyped with the cotton single nucleotide polymorphism (SNP) 63 K array, and phenotyped with race-18 of CBB, localized the CBB resistance to a 2.01-Mb region in the long arm of chromosome D02. Molecular genetic mapping using an F-6 recombinant inbred line (RIL) population showed the CBB resistance in cultivar Arkot 8102 was controlled by a single locus (BB-13). The BB-13 locus was mapped within the 0.95-cM interval near the telomeric region in the long arm of chromosome D02. Flanking SNP markers, i04890Gh and i04907Gh of the BB-13 locus, identified from the combined linkage analysis and GWAS, targeted it to a 371-Kb genomic region. Candidate gene analysis identified thirty putative gene sequences in the targeted genomic region. Nine of these putative genes and two NBS-LRR genes adjacent to the targeted region were putatively involved in plant disease resistance and are possible candidate genes for BB-13 locus. Genetic mapping and genomic targeting of the BB13 locus in the current study will help in cloning the CBB-resistant gene and establishing the molecular genetic architecture of the BB-13 locus towards developing durable resistance to CBB in cotton.
引用
收藏
页码:4421 / 4436
页数:16
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