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两个陆地棉型纤维品质优异品系94173和94250分别与推广品种中棉所12号、鲁棉11号、中棉所16号和鲁棉10号杂交,按方法2模式Ⅰ配成6×6共21个组合。纤维长度、马克隆值、籽棉产量、单铃重和籽指的G.C.A.效应达显著水平,除衣分率外,上述各性状S.C.A.效应均达显著水平。其中纤维长度、马克隆值和籽指G.C.A.方差/S.C.A.方差比值较大,证明以加性效应为主。G.C.A.估算结果表明,94173和94250是提高陆地棉品种纤维品质性状育种非常有价值的亲本,通过杂交可同时兼顾后代纤维长度、强度和细度的改良。通过S.C.A.的估算认为,在某些组合F1会有杂种优势出现,而在系谱选择中应注意其干扰。在纤维长度、马克隆值、籽棉产量、单铃重、衣分率和籽指的遗传模式推导中,只有纤维长度和衣分率符合加性+显性模式。纤维长度为部分显性,长绒基因既有隐性,也有显性,广义遗传力为7817%,狭义遗传力为6744%;衣分率广义遗传力和狭义遗传力分别只有2608%和2116%,高衣分率基因较多的表现为隐性。
Two cotton cultivars 94173 and 94250 with excellent cotton fiber quality were crossed with the varieties CIMC No.12, Lumi Mian11, Zhongmiansuo16 and Lurian10, respectively. 21 combinations. Fiber length, micronaire, seed cotton yield, boll weight, and G. C. A. Effect reached a significant level, in addition to clothing points, the above traits S. C. A. The effect reached a significant level. Among them, the fiber length, micronaire value and seed finger G. C. A. Variance / S. C. A. Variance ratio is large, mainly to show additive effects. G. C. A. The estimation results show that 94173 and 94250 are valuable parents for breeding fiber quality traits of upland cotton varieties, and the improvement of fiber length, strength and fineness of the offspring can be taken into consideration simultaneously by crossing. Pass s C. A. The estimates suggest that F1 will have heterosis in some combinations, while interference should be noted in pedigree selection. Among the fiber length, micronaire value, seed cotton yield, boll weight, lint percentage, and genetic model of seed index, only the fiber length and lint percentage conformed to additive + dominant mode. The length of the fiber was partly dominant. The gene of plush was both recessive and dominant. The general heritability was 78.17% and the narrow heritability was 67.44%. The heritability of broad-leaved heritability and narrow heritability were only 26 08% and 2116%, the performance of high-coat fraction genes showed recessive.