辽宁省粳稻杂交育成品种亲本演变分析

以1974年～2005年辽宁省审定的杂交育成品种为分析材料,通过对品种系谱的追溯并结合育成品种亲本类型及杂交类型的分析,探讨了辽宁省粳稻杂交育成品种亲本应用的特点。结果表明,随着品种的演变品种亲本利用得到拓宽,品种遗传基础得到丰富,品种的生态适应性和丰产性得到加强。不断引入新种质对原始亲本加以改良,综合利用亚种间杂交、地理远缘杂交、品种间杂交实现不同类型、不同生态区品种的融合,应用多种杂交方式实现水稻性状的改良与提高,是辽宁水稻杂交育种中亲本选择的基本经验。

The Parent Evolution of Cross-Breeding Japonica Rice Varieties in Liaoning

With cross-bred rice varieties in Liaoning from 1974 to 2000 as entries,the analysis on pedigree,parent type and cross type were made and the characters of those parents were evaluated in the project.The results showed that with the rice varieties being replaced,the parent application was developed,and variety hereditary base was broadened;variety ecological adaptation and high-yielding capacity were strengthened.It is a basic experience for parent selection in cross-breeding in Liaoning that the germplasm was introduced and enhanced;the mergence of different type and ecological varieties was realized through sub-species cross,wide cross and inter variety cross.