水稻籽粒矿质元素含量遗传及主要农艺性状相关性分析

通过了解水稻子粒钙、镁、铜、铁、锌和硒等矿质元素含量,以绿旱1号作为父本与102S、KD36S、7HS012及7HS013不育系为母本进行配组,对父本与杂交后代主要农艺及经济性状、水稻子粒中的矿质元素含量进行了遗传分析,并对各杂交后代的主要农艺性状和子粒中矿质元素含量以及各矿质元素含量间进行了相关性分析.结果表明,杂交后代农艺及经济性状多数表现出超高亲分离现象,且LK3的农艺及经济性状均表现为最好.水稻子粒矿质元素含量与部分农艺和经济性状存在明显的正相关或负相关关系,且K、Mg、Zn、Se等元素含量与水稻产量密切相关.水稻子粒中矿质元素含量大小依次为P＞K ＞Mg ＞S＞ Ca＞ Mn ＞Fe ＞Zn ＞Cu ＞Se,4个杂交后代的K元素含量表现出超高亲分离现象,LK2、LK3和LK4的Fe元素含量也表现出超高亲分离现象.水稻子粒大量与微量元素之间相关性最高,微量元素之间相关性次之,大量元素之间相关性最小,以7HS012不育系为母本得到的杂交后代农艺性状表现较好,矿质元素含量最高,7HS013次之,其他不育系表现一般.本研究为选育出耐旱及营养价值高的水稻新品种母本的选择提供了理论依据.

Genetic Analysis of Rice Grain Mineral Elements Content and Correlation Analysis with Main Agronomic Characters

Contents of mineral elements including micronutrients as Ca, Mg, Cu, Fe, Zn and Se in rice grains were researched. Lvhan No.1 as male parent, 102S, KD36S, 7HS012 and 7HS013 as female parents, some hybrid combinations were selected, genetic analysis of main agronomic and economic characters and mineral elements were measured between parents and hybrid combinations, correlation analysis between agronomic characters and mineral elements, among mineral elements of all hybrid combinations were analyzed. The result showed that many agronomic and economic characters of hybrid combinations were better than Lvhan No.1, and LK3 was the best. There were some positive or negative correlation between mineral elements content and agronomic characters. the relationship of K, Mg, Zn,Se and other elements and the yield of rice was close. The order of mineral elements content was P>K>Mg>S>Ca>Mn>Fe>Zn>Cu>Se, the K contents of all hybrid combinations were better than Lvhan No.1, and Fe contents of LK2, LK3 and LK4 were also better than Lvhan No.1. The relationship was the closest among trace elements, the relationship of major elements and trace elements was second, the relationship among major elements was farthest. Agronomic characters or mineral elements content of hybrid combinations which 7HS012 as female parent were best. 7HS013 as female parent was second, others were ordinary. This study provides some theoretical basis for selecting female parent of drought tolerance and high nutritional value rice.