【摘要】 以MINQUE(1)统计方法 ,利用AD模型对 9个海岛棉品种 (系 )及其 2 0个F1组合 5个纤维品质性状的 3年资料进行遗传分析。结果表明 ,海岛棉F1代纤维品质性状多以加性效应为主 ;2 5 %跨长、整齐度和比强度还存在极显著的显性效应 ;5个品质性状的显性效应与环境的互作以及比强度、伸长率和麦克隆值的加性效应与环境的互作均达显著或极显著水平 ;2 5 %跨长的普通狭义遗传率达 4 5 %以上。A杂交铃和新海 8号是海岛棉品质性状较好的亲本。用AD模型对海岛棉F1和F2 品质性状的杂种优势分析表明 ,海岛棉品种间杂交的F1和F2 品质性状的遗传一般表现为负向超高亲优势。更多还原

【Abstract】 Five fiber traits of 9 parents and their 20 F 1 crosses of Island Cotton for three years were analyzed for their addi- tive and dominance effects by MINQUE(1) approaches. The results indicated that F 1 fiber traits were mainly controlled by the additive effects in Island Cotton;2.5% span-length,uniformity and fiber strength were showed highly significant dominant effects;the dominant effects interactions by years were significant for five fiber traits,so were additive effects interaction by years of fiber strength,elongation and micronaire value. Broad and narrow sense heritability estimates were significant at 0.01 level for 5 fiber traits. The ordinary narrow sense heritability estimate of 2.5% span-length was above 45%. A Zajiaoling and Xinhai 8 were better parents for fiber quality breeding in Island Cotton. The heterosis of fiber traits were analyzed by the genetic model of additive-dominance by MINQUE(1) approaches for predicting the genotypic value and heterosis for F 1 and F 2. General speaking,the fiber traits were significantly negative for the better-parental heteros is of crosses among cultivars in Island Cotton.更多还原