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水稻色素原基因C的精细定位 被引量:9

Fine Mapping of C(Chromogen for Anthocyanin) Gene in Rice
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摘要 应用籼稻组合珍汕97B/密阳46的衍生材料,针对水稻第6染色体短臂色素原基因C的可能位置,筛选到在C基因周围区间呈不同基因型组合的7个剩余杂合体,收获种子建立F2∶3群体。在各个植株上,稃尖颜色和叶鞘颜色的表现完全相同。通过各个群体颜色表现与原剩余杂合体基因型的比较,将C基因定位于微卫星标记RM314与RM253之间。在该基础上,应用两个分离群体共1279个样本,经标记检测和连锁分析,进一步将C基因定位于RM111和RM253之间,与RM111和RM253的遗传距离分别为0.7 cM和0.4 cM。最后,应用区间内的另外6个微卫星标记和1个源于C基因候选基因OsC1的标记,检测在RM111-C基因-RM253区间内发生了重组的22个个体,将C基因定位于一个大小为59.3 kb、涵盖C基因候选基因OsC1座位的区间中。 Seven residual heterozygous lines (RHLs) displaying different genotype compositions in the genomic region covering probable locations of C (chromogen for anthocyanin) gene on the short arm of rice chromosome 6 were selected from the progenies of the indica cross Zhenshan 97B/Milyang 46. Seeds were harvested from each of the seven plants, and the resultant F2:3 populations were used for fine mapping C gene. It was shown in the populations that the apiculus coloration matched to basal leaf sheath coloration in each plant. By relating the coloration performances of the populations with the genotype compositions of the RHLs, the Clocus was located between rice SSR markers RM314 and RM253. By using a total of 1279 F2 : 3 individuals from two populations showing coloration segregation, the C locus was then located between RM111 and RM253, with genetic distances of 0. 7 cM to RM111 and 0.4 cM to RM253. Twenty-two recombinants found in the two populations were assayed with seven more markers located between RM111 and RM253, including six SSR markers and one marker for the C gene candidate, OsC1. The C locus was delimited to a 59.3-kb region in which OsC1 was located.
出处 《中国水稻科学》 CAS CSCD 北大核心 2007年第5期454-458,共5页 Chinese Journal of Rice Science
基金 国家863计划资助项目(2006AA10Z1E8) 农业部超级稻专项资助项目(200606) 浙江省自然科学基金资助项目(Y304446)
关键词 色素原基因 精细定位 候选基因 剩余杂合体 水稻 anthocyanin gene fine mapping candidate gene, residual heterozygous line rice
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参考文献15

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