五个美国水稻品种的广亲和性及其系谱分析

WIDE COMPATIBILITY OF FIVE AMERICAN RICE VARIETIES AND PEDIGREE ANALYSIS

从美国水稻品种中筛选出Ｂｎｌｌｅｐａｔｎａ、Ｎｅｗｂｏｎｎｅｔ、Ｎｏｒｔａｉ、Ｓａｔｕｒｎ和Ｖｅｇｏｌｄ等广亲和品种，其亲和性表现为广谱低强度性和特异亲和性。系谱分析表明，五个品种的遗传基础主要来源于中国籼型品种Ｐａｃｈａｉｎ、菲律宾籼型品种ＭａｒｏｎｇＰａｒｏｃ、日本粳稻品种ＵＮＪＰ以及Ｃｏｌｕｓａ等，即具有中国和菲律宾籼稻、日本粳稻的亲缘。品种农艺性状不甚理想，单株有效穗少是其主要问题。有必要对美国品种的特性及广亲和机理进行深入的研究。

Five wide compatibility rice varieties including Belle Patna, New bonnet, Nortai,Saturn and Vegold with low intensity of wide compatibility and special compatibility were screened from American rice varieties. The pedigree analysis indicated that the genetic bases of these five varieties mainly derived from Indict varieties-Pachain of China,Marong Paroc of Philipine and Japonica varieties-UNJP of Japan, Colusa of China and other cultivars, meaning these five varieties were related to Indica rice from China and Philipines, Japonica rice from Japan. These varieties have some. unfavourable agronomic characteristcs,especially low number of effective panicle per plant. It is essential,therefore, to make further study on the feature and mechanism of wide compatibility of American varieties.