中文摘要：

本研究利用云南海拔2650 m高寒稻区种植的地方粳稻老品种小麻谷与具有籼稻细胞质背景的改良品系南34为亲本,分析比较了在400、1860和2200 m 3个不同海拔下产生的正反交F2群体形态性状的遗传差异。结果表明,细胞质和海拔引起杂合体花粉育性的差异可导致其F2群体中形态性状发生明显的遗传变异,其中细胞质对F2群体形态性状遗传变异的效应随产生群体海拔的升高而增加,在2200 m的高海拔细胞质效应最为明显。该研究结果对探讨环境温度对细胞质效应的影响具有重要的参考价值。

英文摘要：

The genetic differences of morphological characters were analyzed in reciprocal F2 populations generated at three different altitudes of 400, 1860 and 2200 m. The material parents are Xiaomagu, Japonica rice landraee grown at Yunnan alpine region at 2650 m, and Nan34, an improved line that cytoplasm donated by Indiea rice. The results showed that the cytoplasmic backgrounds and altitude variation had selecting pressure on pollen genotype of Fl s, and such fertility difference could result in genetic variation on descendant progenies. The effects of cytoplasm on genetic variation of morphological traits in F2 populations increase with the rising F2 -generated altitude, and the largest effects of cytoplasm on it were found at 2200m altitude. The results could be reference for discussing the effects of environmental temperature on cytoplasmic effects.