不同锌离子活度下水稻锌高效基因型农艺特性的遗传分析

本试验以耐低锌基因型和锌敏感基因型水稻为材料, 采用双列杂交, 选择耐低锌基因型和锌敏感基因型水稻在缺锌条件下反应差异较明显的总干重、地下部干重、地上部干重、叶龄、株高、根长等性状在不同锌离子活度下的相对值研究了水稻锌高效基因型农艺性状的遗传特性, 结果表明: 研究性状的显性方差都达显著和极显著水平, 在总方

Genetic Analysis of Agronomic Traits for Zn-efficient Rice (Oryza sativa L.) Genotype at Different Zn2+ Activity

The hereditary characteristic of agronomic trait of Zn-efficiency rice genotype was analyzed from the relative value of total dry matter, shoot dry matter root dry matter, grown leaf number, plant height, and root length of rice seedling in different Zn 2 activity by using a dilled cross with Zn-efficiency and Zn-inefficiency rice genotype. It was revealed that the dominant effects variance of all studied trait were significant or very significant with the ratio being more than 65.35% of total variance. The additive effect variance of other traits except for root length were also significant or very significant, with the average ratio being 21.85% of total variance; The epistatic effect variance of root length was significant, with a ratio of 48% of total variance. The relative root length in different Zn 2 active was governed by dominant and additive effect of hereditary gene; The relative value of grown leaf number, plant height, dry matter weight and Zn concentration of rice seedling were mainly governed by dominant effect of gene, secondarily by additive effect of gene. If the rice genotypic ability of tolerance to Zn deficit was valued by these agronomic traits, it was mainly governed by dominant effect of gene, secondarily by additive effect of gene, and might be influenced by epistatic effect of gene.