Marker-assisted pyramiding of soybean resistance genes &ITRSC4&IT, &ITRSC8&IT, and &ITRSC14Q&IT to soybean mosaic virus
文献类型: 外文期刊
第一作者: Wang Da-gang
作者: Wang Da-gang;Zhao Lin;Li Ka;Ma Ying;Wang Li-qun;Yang Yong-qing;Yang Yun-hua;Zhi Hai-jian;Wang Da-gang
作者机构:
关键词: soybean;soybean mosaic virus;resistance genes;pyramiding;marker-assisted breeding
期刊名称:JOURNAL OF INTEGRATIVE AGRICULTURE ( 影响因子:2.848; 五年影响因子:2.979 )
ISSN: 2095-3119
年卷期: 2017 年 16 卷 11 期
页码:
收录情况: SCI
摘要: Soybean mosaic virus (SMV) is one of the major viral pathogens affecting soybean crops worldwide. Three SMV resistance genes, R-SC4, R-SC8, and R-SC14Q, have been identified and mapped on soybean chromosomes 14, 2, and 13 from Dabaima, Kefeng 1, and Qihuang 1 cultivars, respectively. Soybean cultivar Nannong 1138-2 is widely grown in the Yangtze River Valley of China. In this study, crosses were made between Qihuang 1xKefeng 1 and DabaimaxNannong 1138-2. Ten simple sequence repeat (SSR) markers linked to three resistance loci (R-SC4; R-SC8, and R-SC14Q) were used to assist pyramided breeding. Pyramided families containing three resistance loci (R-SC4, R-SC8, and R-SC14Q) were evaluated by inoculating them with 21 SMV strains from China. Results indicated that the 10 markers can be used effectively to assist the selection of resistant individuals containing R-SC4, R-SC8, and R-SC14Q. A total of 53 F-6 plants were confirmed to contain three homozygous alleles conferring resistance to SMV. Five F-7 homozygous pyramided families exhibited resistance to 21 strains of SMV and showed desirable agronomic traits using dual selection. The strategy of pyramiding resistance gene derived from different varieties has practical breeding value in providing broad-spectrum resistance against the existing strains of SMV in China.
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