合系35×老来红联合世代耐低磷性状主基因加多基因遗传研究

Jointly segregating analysis of tolerance ability to low phosphorus using major gene plus poly-gene model in hexi35× Laolaihong

磷高效水稻培育是提高土壤潜在磷利用效率的一种途径,用云南主栽粳稻品种合系35与云南稻种核心种质耐低磷特性极强老来红配制P1,P2,F1和F2世代,在云南省农科院(海拔1916 m)种植两处理(有效磷质量比6.26 mg/kg,有效磷40 mg/kg)耐低磷鉴定,采用数量性状的主基因-多基因混合遗传模型,研究了水稻的分蘖、株穗重和总干重3个耐低磷指标性状的遗传,结果表明,分蘖、株穗重和总干重3个耐低磷指标性状在这个组合中都表现为一对主基因加多基因遗传和多基因遗传2种遗传模式.

It is the effective approach of improving phosphorous use efficiency to breed the rice varieties with high phosphorous use efficiency. P1, P2, F1, F2 were made by Yunnan landrance variety Hexi35 （P1） and Yunnan core collection Laolaihong （P2）which has stronger ability of tolerance to low - P. And then, Pt, P2, F1, F2 were planted under low phosphorous of soil （6.26 mg/kg） and high level （40 mg/kg） in Yunnan Academy of Agricultural Sciences, Kunming（elevation 1 916 m）. The inheritance of tiller, grain yield per panicle and total weight of rice was studied by means of a mixed inheritance models of quantitative traits of a major gene plus polygene. This is based on the results showed that tiller,grain yield per panicle and total weight of rice in the combination were expressed in two different combinations were both expressed in majorgene plus polygene and polygene inheritent models.