Detection of downy and powdery mildew resistance QTL in a ‘Regent’ × ‘RedGlobe’ population

被引：0
|
作者：
Carel J. van Heerden
Phyllis Burger
Abraham Vermeulen
Renée Prins
机构：
[1] Stellenbosch University,Department of Genetics
[2] ARC Infruitec-Nietvoorbij,undefined
[3] CenGen (Pty) Ltd & University of Free State,undefined
来源：
Euphytica | 2014年 / 200卷
关键词：
Genetic mapping; QTL mapping; Grapevine; Pathogen;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
One hundred and eighty six F1 plants from a ‘Regent’ × ‘RedGlobe’ cross were used to generate a partial linkage map with 139 microsatellite markers spanning all 19 chromosomes. Phenotypic scores for downy mildew, taken over two years, confirmed a major resistance QTL (Rpv3) against downy mildew in the interval VVIN16-cjvh to UDV108 on chromosome 18 of ‘Regent’. This locus explained up to 62 % of the phenotypic variance observed. Additionally a putative minor downy mildew resistance locus was observed on chromosome 1 in one season. A major resistance locus against powdery mildew (Ren3) was also identified on chromosome 15 of ‘Regent’ in the interval UDV116 to VChr15CenGen06. This study established the efficacy of and validated the ‘Regent’-derived downy and powdery mildew major resistance genes/QTL under South African conditions. Closely linked SSR markers for marker-assisted selection and gene pyramiding strategies were identified.
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页码：281 / 295
页数：14
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