籼粳稻细胞质背景下Rf-1位点PCR标记的遗传分离  

Genetic Segregation of PCR Marker Located within Rf-1 Locus under Cytoplasmic Backgrounds Donated by Indica and Japonica Rice

作　　者：王石华[1] 谭亚玲[1] 谭学林[1] 文建成[1] 寇姝燕[1] 金寿林[1] 洪汝科[1] 

机构地区：[1]云南农业大学稻作研究所,昆明650201

出　　处：《分子植物育种》2009年第3期456-460,共5页Molecular Plant Breeding

基　　金：国家自然科学基金项目(30860065);云南省十一五科技攻关项目(2006NG05)资助

摘　　要：本文在籼、粳稻细胞质背景下研究了Rf-1位点上PCR标记M45461的遗传分离比例,结果显示M45461的遗传分离与提供雄配子的杂合体的细胞质背景有关。粳稻细胞质不影响M45461的遗传分离比例,而籼稻细胞质会导致M45461极显著偏向籼稻或具有籼稻遗传成分较重的亲本。在籼、粳稻细胞质背景下,杂合体的花粉育性分别为半不育和正常可育,而小穗育性均正常。说明M45461的偏分离与雄配子选择有关,而与雌配子关系不大。该结果还揭示粳稻细胞质可以与籼稻细胞核和谐共存,籼稻细胞质则与粳稻细胞核存在不谐和的遗传互作。这一结论可以为籼粳分化的研究提供一些参考,也可为籼粳杂交父母本选择提供参考。In the present study, genetic segregation of PCR marker M45461, which is located within restoring gene Rf-1 locus was investigated on segregating populations under cytoplasmic backgrounds donated by indica and japonica rice. The results revealed that the genetic segregations of M45461 were related to cytoplasmic backgrounds of heterozygotes that provided male gametes. M45461 was seriously distorted towards indica parent or the one possessing indica genetic components in the populations with indica cytoplasmic background, but the marker was segregated with normal ratios in populations with japonica cytoplasmic background. The heterozygotes that provided male gametes had normal pollen fertility under japonica cytoplasmic backgrounds, but they had only around 50% fertile pollens under indica cytoplasmic backgrounds, although they all had normal spikelet fertility. The results indicated that the segregation distortion was correspond with the male gametes but not with female ones. The results also indicated that indica cytoplasm is not well compatible with japonica nuclear background, while japonica cytoplasm does not have such trouble with indica nuclei. The results could be reference for studies of indica-japonica differentiation, and for female parent selection in breeding involved indica and japonica parents.

关 键 词：水稻 籼粳分化 偏分离 细胞质 Rf-1位点 

分 类 号：S511.2[农业科学—作物学]