意大利稻种资源评价与遗传背景分析

Assessment and Genetic Background Analysis of Italian Rice Resources

本研究对意大利水稻资源的农艺性状、杂种优势、遗传背景进行了分析。结果表明:意大利资源多是矮秆或半矮秆类型,粒型偏大,全生育期属中早熟类型。由于其在天津的适应性不佳,丰产效果差,因此不适合在本地直接应用。但意大利水稻资源的遗传背景与国内资源具有较大的差异,F1具有较强的杂种优势,是品种改良和杂种优势利用的优异亲本资源。

The agronomic traits, heterosis, genetic background of halian rice resources were analyzed in the paper. The results indicated that most of them were dwarf or semi-dwarf rice varieties, with large-grain type and belong to mid-early maturing varieties with their whole growth period. Because of their poor adaptability and negative yield performance in Tianjin, the Italian rice resources were not suitable to grow in local field. Nevertheless, it was the big difference of genetic background between Italian and domestic rice resources that made the F 1 have stronger heterosis, so the Italian rice resources were excellent parent resource for breed improvement and heterosis utilizationo