辽宁省粳稻育成品种遗传基础分析

以辽宁省1980～2000年审定的71个粳稻品种为分析材料,通过对其系谱、细胞核构成及细胞质来源进行了分析。结果显示,在系谱结构上,日本粳稻丰锦、福锦、黎明、Pi5、三好共衍生出54个水稻品种,占品种总数的76.06%。在细胞核构成上,外来种质资源占辽宁省粳稻育成品种平均细胞核比例的71.86%,其中日本粳稻资源比例达到67.06%。在细胞质来源上,外引19个细胞质家族共衍生出55个水稻品种,占品种总数的77.46%,其中日本粳稻15个细胞质家族,衍生水稻品种数占育成品种总数的46.48%。表明,外引种质资源对辽宁省粳稻品种的基础性作用,日本粳稻资源对辽宁省粳稻品种具有较大的遗传贡献,在一定程度上辽宁省粳稻育成品种遗传背景较为单一。同时,探讨了拓宽辽宁省粳稻品种群体遗传基础及水稻种质资源利用的措施。

Analysis on Genetic Basis of Released Japonica Rice in Liaoning

The pedigree,nucleus structure and cytoplasm source were analyzed by using 71 rice varieties released from 1980 to 2000.The results showed that in pedigree,54 rice varieties were derivative from Japanese japonica Fengjin,Fujin,Liming,Pi5 and Sanhao,accounting for 76.06% of total varieties.In nucleus structure,foreign germplasm resources accounted for 71.86% of total japonica,especially Japanese germplasm resources accounting for 67.06%.In cytoplasm source,55 rice varieties were derivative from 19 foreign ge...