粳稻“龙锦1号/香软米1578” F3家系群糙米矿质元素含量变异及相关性分析

 利用粳稻品种间杂交组合“龙锦1号/香软米1578”的196份F3家系，对糙米中Fe、Se、Zn、Cu、Mn、Ca、Mg、K、Na和P等10种矿质元素含量的变异及其相关性进行了分析。 10种矿质元素在F3家系间均有较大的变异，其中Na含量变异最大，Zn含量变异最小，变异系数分别为77.69％和12.04％。各矿质元素含量的变异系数大小顺序为Na>Se>Cu>Fe>Mg>Mn>Ca>P>K>Zn。不同矿质元素含量也有较大的差异，F3家系群各矿质元素含量平均值高低排序为P>K>Mg>Ca>Fe>Mn>Zn>Na>Cu>Se。糙米中10种矿质元素含量在F3家系群中均表现为正态分布，为由多基因控制的数量性状。Zn与Fe、Cu，Mn与Mg、Ca、K、P，Ca与Mg、K、Na、P，Mg与K、P，P与K、Na含量呈显著或极显著正相关，而Fe与Se、Mn与Na、Mg与Na含量呈显著或极显著负相关。Mn、Ca、Mg、K、P含量与其他矿质元素含量间的相关关系较Fe、Se、Cu、Zn含量与其他矿质元素含量间的相关关系更为密切。

Variation and Correlation Analysis of Mineral Element Contents in Brown Rice of F3 Lines from japonica Combination "Longjin 1/Xiangruanmi 1578"

The variation and relationships among Fe,Se,Zn,Cu,Mn,Ca,Mg,K,Na and P in brown rice of 196 F3 lines,which derived from a cross between japonica rice varieties,Longjin 1 and Xiangruanmi 1578,were analysed.The results showed that there were high variation among these mineral element contents in brown rice for F3 lines.The variation coefficient of Na content was the highest(77.69%),whereas that of Zn content was the lowest(12.04%).The variation coefficient values in brown rice were as follows: Na>Se>Cu>Fe>Mg>Mn>Ca>P>K>Zn.The various mineral element contents were also obviously different,their mean values in brown rice for F3 lines were as follows: P>K>Mg>Ca>Fe>Mn>Zn>Na>Cu>Se.Moreover,these mineral element contents all followed the normal distribution,indicating they were quantitative traits controlled by multiple genes.Zn was significantly positive correlative with Fe and Cu at 0.01 or 0.05 levels,so were Mn with Mg,Ca,K and P;Ca with Mg,K,Na and P;Mg with K and P;P with K and Na.However,the contents of Fe and Se,Mn and Na,Mg and Na displayed significantly negative correlation at 0.01 or 0.05 levels.Furthermore,Mn,Ca,Mg,K and P correlated much more closely with other mineral element contents than Fe,Se,Cu and Zn did.