文献类型： 外文期刊

作者： Xiao, Lu ¹ ; Zhao, Zhi ¹ ; Du, Dezhi ¹ ; Yao, Yanmei ¹ ; Xu, Liang ¹ ; Tang, Guoyong ² ;

作者机构： 1.Qinghai Acad Agr & Forestry Sci, Key Lab Spring Rape Genet Improvement Qinghai Pro, Natl Key Lab Breeding Base Innovat & Utilizat Pla, Xining 810016, Qinghai, Peoples R China

2.Qinghai Acad Agr & Forestry Sci, Key Lab Spring Rape Genet Improvement Qinghai Pro, Natl Key Lab Breeding Base Innovat & Utilizat Pla, Xining 81

关键词： B. rapa;Seed coat color;AFLP;SSR;Fine mapping

期刊名称：THEORETICAL AND APPLIED GENETICS （ 影响因子：5.699； 五年影响因子：5.565 ）

ISSN： 0040-5752

年卷期： 2012 年 124 卷 5 期

页码：

收录情况： SCI

摘要： The development of yellow-seeded cultivars in Brassica rapa (B. rapa) would improve the quality and quantity of available oil. The identification and mapping of the seed coat color gene may aid in the development of yellow-seeded cultivars and facilitate introgression of the yellow-seeded gene into desirable Brassica napus (B. napus) lines through marker-assisted selection. In the current study, we investigated the inheritance of a yellow-seeded landrace in B. rapa, "Dahuang'', originating from the Qinghai-Tibetan plateau. Genetic analysis revealed that the phenotype of the yellow-seeded trait in Dahuang is controlled by one recessive gene, termed Brsc1. Mapping of the Brsc1 gene was subsequently conducted in a BC1 population comprised 456 individuals, derived from (Dahuang x 09A-126) x Dahuang. From a survey of 256 amplified fragment length polymorphism (AFLP) primer combinations, 10 tightly linked AFLP markers were obtained. The closest AFLP markers flanking Brsc1, Y10 and Y06, were 0.2 and 0.4 cM away, respectively. Subsequently, using simple sequence repeat (SSR) markers in the reference map, the Brsc1 gene was mapped on A09 in B. rapa. Blast analysis revealed that seven AFLP markers showed sequence homology to A09 of B. rapa, wherein six AFLP markers in our map were in the same order as those in A09 of B. rapa. The two closest markers, Y10 and Y06, delimited the Brsc1 gene within a 2.8 Mb interval. Furthermore, Y05 and Y06, the two closest AFLP markers on one side linked to Brsc1, were located in scaffold 000059 on A09 of B. rapa, whereas the closet AFLP marker on the opposite side of Brsc1, Y10, was located in scaffold000081 on A09 of B. rapa. Molecular markers developed from these studies may facilitate marker-assisted selection (MAS) of yellow-seeded lines in B. rapa and B. napus and expedite the process of map-based cloning of Brsc1.