小白谷×大理早籼重组自交系耐冷性状遗传研究  

GENETIC STUDIES OF COLD-TOLERANCE CHARACTERS OF THE RIL POPULATIONS OF "KUNMING XIAOBAIGU × DALI ZAIXIAN

作　　者：曾亚文[1] 申时全[1] 文国松[1] 

机构地区：[1]云南省农业科学院农作物品种资源站,云南昆明650205

出　　处：《西南农业大学学报（自然科学版）》2001年第6期494-497,共4页Journal of Southwest Agricultural University

基　　金：国家自然科学基金资助 (30 1 60 0 4 3);云南省省院省校合作项目 (98ZN 0 7)

摘　　要：以云南稻种昆明小白谷与大理早籼配制的杂种培育出的重组自交系 (RILs)为材料进行耐冷性状遗传研究。结果表明 :(1)早籼与晚粳杂交培育出的RILs群体的耐冷性状的遗传多样性突出 ,并呈现广泛的遗传变异。 (2 )耐冷性状的差异既有主效基因也有微效基因 ,在长期的生态驯化过程中微效基因累积到一定程度可变为主效基因。 (3)昆明小白谷耐冷性是受主效基因支配 ,冷驯化是水稻微效耐冷基因累积获得穗期耐冷性的途径之一。The RIL (recombination inbred line) populations of the rice cross 'Kunming Xiaobaigu × Dali Zaoxian' were used to study the genetics of their characters associated with cold tolerance. Wide genetic variation and diversity were observed in the RIL populations between early indica type and late japonica type in their cold tolerance characters. The difference in cold tolerance characters involved both major and minor genes, and the accumulation of minor genes in ecological acclimation resulted in the formation of major genes. A major gene was found to control cold tolerance in Kunming Xiaobaigu. Cold acclimation is presumed to be one of the approaches by which rice genotypes may acquire cold tolerance at the booting stage.

关 键 词：重组自交系 耐冷性状 遗传分析 水稻 水白谷×大理早籼 

分 类 号：S511.210.1[农业科学—作物学]