论文部分内容阅读
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 ,在总方差中所占的比重 ,平均达 6 5 .35 %;加性效应方差除根长外 ,也都达到显著或极显著的水平 ,在总方差中所占的比重 ,平均达 2 1.85 %;加加上位性效应则只有根长达显著水平 ,其方差占总方差的 48%。根长的相对值受遗传基因的显性效应和加加上位性效应控制 ;叶龄、株高、干物重及锌含量的相对值主要受遗传基因的显性效应控制 ,同时也受到基因的加性效应的影响。若以这些性状来衡量水稻的耐缺锌能力 ,则水稻耐缺锌能力主要受基因的显性效应控制 ,其次受基因的加性效应控制 ,基因的加加上位性效应可能也有一定的影响。
In this study, the low-zinc genotype and zinc-sensitive genotypes of rice as material, using double row hybridization, select low-zinc genotype and zinc-sensitive genotypes of rice under zinc deficiency reaction more obvious differences in total dry weight, Dry weight, shoot dry weight, leaf age, plant height, root length and other properties under different zinc ion activities of the genetic characteristics of agronomic traits of zinc efficient genotypes of the results showed that: the traits of the dominant variance All reached a significant and extremely significant level, accounting for 65.35% of the total variance. The additive effect variance also reached significant or extremely significant levels except root length, which accounted for 65% of the total variance The average proportion was 2 1.85%. Only the root length reached a significant level and the variance accounted for 48% of the total variance. The relative value of root length was controlled by the dominant effect of genetic gene and plus epistasis effect. The relative value of leaf age, plant height, dry matter weight and zinc content was mainly controlled by the dominant effect of the genetic gene, Effect of sexual effects. If these traits are used to measure the ability of zinc to tolerate zinc deficiencies, the ability of zinc-tolerant rice to resist zinc deficiency is mainly controlled by the dominant effect of the gene, followed by the additive effect of the gene, and the additive effect of the gene may also have some effects.