云南稻核心种质矿质元素含量及其变种类型

用等离子体原子发射光谱法测定了在云南省新平县同时繁殖的653份云南稻种核心种质糙米中的P、K、Ca、Mg、Fe、Zn、Cu和Mn共8种矿质元素的含量，比较了云南稻种核心种质8种矿质元素含量与变种分类性状间的差异。结果表明高产多抗育种、多样性降低与矿质元素含量的变化密切相关；高产和多抗水稻品种的K、Ca、Mg、Mn含量明显增加，P、Fe、Zn、Cu含量则明显降低，这与水稻矿质营养的遗传和生理机制密切相关。云南稻种核心矿质元素含量存在地带性分布, P、Fe、Zn、Cu含量高低可能与多样性中心有一定联系。核心种质矿质元素高低及其多样性与籼粳关系不大，但在水陆、粘糯、光壳与否、米色、米味、软米与否之间差异明显。这些结果间接支持了“亚洲栽培稻种—籼粳亚种—生态群—生态变种群—品种类型”五级分类系统的生态变种群。

Varietal Type and Mineral Elements Content of Core Collection in Yunnan Rice

Eight elements contents of 653 brown rice samples in Yunnan which harvested from Xinping experiment farm under the same ecological condition were analysed by ICP AES method, eight elements contents from Yunnan rice were compared with the varietal classification traits. Results showed that the mineral elements content was closely related to low diversity and high yield, multi resistant breeding; The K,Mg,Ca,and Mn elements contents of high yield and resistant varieties were high, but the other elements (P,Fe,Zn and Cu) were low, which was associated with the heredity and physiology of mineral nutrients. There were the zonal distribution of mineral elements content from Yunnan rice, especially P, Fe, Zn and Cu related to the diversity center, paddy versus upland, waxy versus non waxy, glume hair versus nuda, rice color, rice taste, soft rice versus non soft rice, but it was not associated with indica and japonica. Results supported the ecological variety groups view of 5 grade taxonomic system "species, subspecies, ecological groups, ecological variety groups, varietal types".