摘要
本文以来源不同的９个自交系及其按双列杂交组成的３６个正交Ｆ１组合为材料， 研究了玉米幼苗根系吸收硫酸盐（Ｎａ３５２ＳＯ４）的动力学参数（Ｋｍ和Ｖｍａｘ）与产量杂 种优势（Ｈ）的关系·结果表明，Ｖｍａｘ与Ｈ无明显的数量关系，Ｋｍ与Ｈ间呈显著的 直线相关（ｒ＝－０．３３３１，Ｐ＜０．０５）．Ｋｍ可作为早期预测产量杂种优势的一个生理 参考指标。
The present Faier is concerned in the relationship between yield heterosis is (H) and the kinetic parameters(Km and Vmax) of sulfate uptake (Na352SO4)by seedling roots in maize,The data used in analysis came from an experiment involving 9 inbred lines and their 36 single crosses in a diallel mating design without reciprocals.The results showed that (l) sulfate uptake capacity has significant difference among genotypes in maize and generally higher heterosis; (2) a sinificant linear regressive relationship between Km and H was found (Y=157. 78-0. 32x) , but no obvious relation of Vmax with H was observed.Km was considered as a physiological indice for refrerence which predicted the performance of hybrids the dur ing phase earlier growth.
出处
《四川农业大学学报》
CSCD
1995年第2期154-157,160,共5页
Journal of Sichuan Agricultural University
关键词
玉米
硫酸盐
杂种优势
配合力
MAIZE
SULFATE UPTAKE
HETEROSIS
CORRELATIONS
COMBINING ABILITY.
