Mapping of Rym14Hb, a gene introgressed from Hordeum bulbosum and conferring resistance to BaMMV and BaYMV in barley

被引：43
|
作者：
Ruge, B
Linz, A
Pickering, R
Proeseler, G
Greif, P
Wehling, P
机构：
[1] Fed Ctr Breeding Res Cultivated Plants, Inst Agr Crops, D-18190 Gross Lusewitz, Germany
[2] New Zealand Inst Crop & Food Res Ltd, Christchurch, New Zealand
[3] Fed Ctr Breeding Res Cultivated Plants, Inst Epidemiol & Resistance Resources, Aschersleben, Germany
[4] Saatzuchtgesell Strengs Erben GmbH & Co KG, Uffenheim, Germany
来源：
THEORETICAL AND APPLIED GENETICS | 2003年 / 107卷 / 06期
关键词：
soil-borne virus resistance; Hordeum bulbosum; Hordeum vulgare; introgression mapping; Rym14(Hb);
D O I：
10.1007/s00122-003-1339-4
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
Hordeum bulbosum represents the secondary gene pool of barley and constitutes a potential source of various disease resistances in barley breeding. Interspecific crosses of H. vulgare x H. bulbosum resulted in recombinant diploid-barley progeny with immunity to BaMMV after mechanical inoculation. Tests on fields contaminated with different viruses demonstrated that resistance was effective against all European viruses of the soil-borne virus complex (BaMMV, BaYMV-1, -2). Genetic analysis revealed that resistance was dominantly inherited. Marker analysis in a F5 mapping family was performed to map the introgression in the barley genome and to estimate its size after several rounds of recombination. RFLP anchor-marker alleles indicative of an H. bulbosum introgression were found to cover an interval 2.9 cM in length on chromosome 6HS. The soil-borne virus resistance locus harboured by this introgressed segment was designated Rym14(Hb). For marker-assisted selection of Rym14(Hb) carriers, a diagnostic codominant STS marker was derived from an AFLP fragment amplified from leaf cDNA of homozygous-resistant genotypes inoculated with BaMMV.
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收藏
页码：965 / 971
页数：7
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