高州普通野生稻主要生殖性状的数理统计分析  

Mathematically Statistical Analysis of Main Reproductive Characteristics of Oryza rufipogon Griff.in Gaozhou

作　　者：杨培周[1] 刘向东[1] 李金泉[1] 卢永根[1] 

机构地区：[1]华南农业大学广东省植物分子育种重点实验室,广州510642

出　　处：《植物遗传资源学报》2006年第4期393-397,共5页Journal of Plant Genetic Resources

基　　金：广东省农业厅重点攻关项目;教育部"高等学校优秀青年教师教学科研奖励计划"(2002383)

摘　　要：高州野生稻各采样点的生殖特性表现出明显的多样性。对141份野生稻的花粉育性、裂药指数、胚囊育性和结实率进行通径分析。结果表明,花粉育性、裂药指数和胚囊育性决定了结实率变异的61.17%,其中裂药指数对结实率的直接作用最大,通径系数为0.6495;花粉育性和胚囊育性对结实率的直接作用较小,通径系数分别为0.2356和0.2137,花粉育性通过裂药指数还有较大的间接通径系数(0.2960)。通过系统聚类,将高州普通野生稻分为4群,并对各群进行方差分析和邓肯氏多重比较,可归纳为:Ⅰ群的花粉育性、胚囊育性和裂药指数对结实率影响小;Ⅱ群主要由胚囊育性影响结实率;Ⅲ群主要由裂药指数影响结实率;Ⅳ群主要由花粉育性和裂药指数共同影响结实率。Diversity of reproductive factors expressed obviously among all the sampling sites of O. rufipogon Griff. in Gaozhou. Path analysis was studied about 141 accessions involving pollen fertility, anther dehiscence index, embryo sac fertility and seed setting rate. The results showed that seed setting rate of 61.17% was effected by pollen fertility, anther dehiscence index and embryo sac fertility, in which anther dehiscence index （the path coefficient reached 0. 6495） was the most important factor. Pollen fertility and embryo sac fertility had almost the same direct effect on seed setting rate, and their direct path coefficients were 0.2356 and 0. 2137 respectively. Indirect path coefficient of pollen fertility via anther dehiscence index reached 0. 2960. 0. rufipogon Griff. of 141 accessions were classified into four groups by cluster analysis, to which the variance analysis and the Duncan＇s multiple comparison test were employed. The details were as follows： In the first group, all the pollen fertility, anther dehiscence index and embryo sac fertility had effects little on the seed setting rate. Seed setting rate is mainly affected by embryo sac fertility in second group, which is affected by anther dehiscence index in the third group, which is affected by anther dehiscence index and pollen fertility in the fourth group.

关 键 词：高州普通野生稻 生殖因子 通径分析 聚类分析 数理统计分析 

分 类 号：S511.9[农业科学—作物学]