水分胁迫下冬小麦芽鞘长度与抗旱性的关系及其遗传特性的研究

研究结果表明：抗旱性不同的小麦品种低水势下芽鞘长差异显著，抗旱性强的品种芽鞘长度高于抗旱性弱的品种。分析了低水势下芽鞘长度与大田干旱条件下产量的相关性，发现低水势下芽鞘长度与旱田产量，抗旱系数的相产 达显著或极显著水平。对低水势下芽鞘长度的遗传率进行了测定，证明该指标的广义遗传率及狭义遗传率都很高，可以用这一指标在进育种早代材料中进行抗旱个体选择。认为，低水势下芽鞘长是抗旱鉴定与抗育种个体选择的良

STUDIES ON HEREDITY OF COLEOPTILE AND RELATIVITY BETWEEN COLEOPTILE LENGTH AND DROUGHT RESISTANCE UNDER WATER STRESS IN WHEAT

7 Different wheat varieties were used,the lensin of coleoptile was measured,the results indicated that the length of coleoptile in drought-resistant genotypes was longerthan that of disdrought resistant ones,and the difference was very significant. The relativity between coleoptile length and drought resistance was studied,which included therelativity between coleoptile length and yield under drought condition (non-irrigation)and the relativity between coleoptile length and drought-resistant ratio (field in non-irrigation siol/field in irrigation soil),the relative coefficients were also significant or verysignificant. The heritability of coleoptile length both broad sense and narrow sense werevery blg (hB2= 60%- 90%, hN2 = 40% ~ 70%), It means that coleoptile length is a goodtrait to criticize the drought resistant ability in wheat, and it can be used to selectdrought-resistant genotypes at early generation in wheat breeding.