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有关影响小麦重要生育进程的根系特征的遗传报道较少。本研究的目的:(1)确定春小麦根系特征的多样性及其同幼苗性状的关系;(2)研究所选择性状的遗传控制方式;(3)确定根系和幼苗性状的相关性。3个试验均在温室内进行.小麦种植在装有蛭石的透明塑料管里。试验1中.种植了42个春小麦品种,3 week后测量根长、叶片长、根条数、叶片数、根干重和冠层干重。试验2研究了6个品种双列杂交产生的15个F_1.同时对生长4 week后的亲本进行评估。采取Griffing方法4(固定模型)对根长、叶片长和根条数进行双列分析。试验3研究了2个F_2群体,每群体由141株组成。试验1的42个品种所有6个性状均存在较大差异。双列分析表明根长、叶片长和根条数的一般配合力和特殊配合力效应均显著。鉴定出了一般配合力高的亲本。根系和幼苗性状间存在着显著正相关性。对F_2群体根长分析表明根长属数量性状遗传。
There are few genetic reports about root traits that affect the important process of wheat growth. The purpose of this study was to: (1) determine the diversity of spring wheat root traits and their relationship to seedling traits; (2) study the genetic control of selected traits; and (3) determine the correlation between root traits and seedling traits. All three experiments were conducted in the greenhouse and the wheat was planted in clear plastic tubes filled with vermiculite. Experiment 1. 42 spring wheat cultivars were planted and after 3 weeks root length, leaf length, number of roots, number of leaves, root dry weight and canopy dry weight were measured. Experiment 2 studied 15 F_1 produced by 6 crosses between pairs of cultivars and evaluated the parents after 4 weeks of growth. Griffing method 4 (fixed model) was used to conduct double-row analysis of root length, leaf length and root number. Experiment 3 investigated two F2 populations, each consisting of 141 strains. All six traits of 42 cultivars in Experiment 1 were quite different. Double-row analysis showed that both the general combining ability and the special combining ability effect of root length, leaf length and root number were significant. The parents with high combining ability were identified. There was a significant positive correlation between root and seedling traits. Analysis of the root length of F2 population showed that root length is a quantitative trait inheritance.