A Preliminary Study on the Relationship Between the Indica-Japonica RAPD Differentiation of Parents and Heterosisin Dian Type Hybrid Rice

作     者：LONG Wen-hong , XU Ming-hui and ZHANG Shu-hua(College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201 , P. R. China Institute of Biotechnology , Yunnan Academy of Agricultural Sciences , Kunming 650223 , P. R. China Rice Research Institute, Yunnan Agricultural University , Kunming 650201 , P. R. China) 

作者机构：College of Landscape and Horticulture Yunnan Agricultural University Kunming 650201 P. R. China 

出 版 物：《Agricultural Sciences in China》 (中国农业科学（英文版）)

年 卷 期：2002年第1卷第12期

页      面：1303-1309页

学科分类：09[农学] 0901[农学-作物学] 

主　　题：Dian type hybrid rice Indica-japonica differentiation Heterosis RAPD 

摘      要：The relationship between the indica-japonica differentiation of parents and heterosis of hybrid in rice was studied with 10 sterile lines, 10 maintainer lines of the sterile lines, 38 restorer lines of Dian type hybrid rice and 40 hybrids derived from the sterile lines and restorer lines. The results indicated that there was a parabolic correlation between the indica-japonica differentiation of parents detected by RAPD markers and heterosis of hybrid rice. When certain indica-japonica differentiation of parents exists, the percentage of combinations with positve heterosis and the mean heterosis of hybrids were high. But that didn t mean too much difference of parents could lead to stronger hetesosis, that meant overdiffernt parents seldom bring positve het-erotic hybrids. Suitable difference of percent of indica alleles of parents of stronger heterotic hybrid was 12 -16%.