Study of gene effects for cotton yield and Verticillium wilt tolerance in cotton plant (Gossypium hirsutum L.)
Study of gene effects for cotton yield and Verticillium wilt tolerance in cotton plant (Gossypium hirsutum L.)
复制标题
DOI：
10.1016/j.fcr.2007.12.018
复制
发表时间：
2008-04-11
影响因子：
5.8
通讯作者：
Romero, F.
中科院分区：
文献类型：
--
作者：
Aguado, A.;De Los Santos, B.;Romero, F.
黄萎病（Verticillium wilt，VW）是由大丽轮枝菌（Verticillium dahliae Kleb.）是棉花的一种毁灭性病害。长期以来，抗病品种的使用一直被认为是最实用和有效的控制手段。本研究以5个陆地棉基因型及其可能的杂交组合为材料，通过对棉花抗黄萎病性和农艺性状的同时选择，研究了陆地棉抗黄萎病性的数量遗传基础。分析了5个棉花品种和10个半双列杂交后代的抗VW性。每年在两个不同的地点，在两个作物季节，在自然发病的土壤中，测定了籽棉产量，单株铃数和铃重，并估计了黄萎病指数（VWI）。用Hayman模型分析遗传方差分量。所有性状的方差分析表明，基因型间差异显著，大多数情况下不存在基因型-位点互作。两者除VWI外，其余性状均表现为加性遗传方差分量（D）和显性遗传方差分量（H1和H2）。D是影响铃重和VWI的最重要因素。铃重是与籽棉产量和VWI相关性最大的性状。铃重和VWI的广义遗传力较高，籽棉产量的广义遗传力中等，单株铃数的广义遗传力较低。铃重的狭义遗传力中等，VWI的狭义遗传力较高。“阿莎”“阿卡拉普瑞玛”、“阿卡拉杰曼510”和“德尔塔平90”是提高铃重的最佳亲本。“阿卡拉普雷玛”、“阿卡拉日耳曼510”和“德尔塔平90”是改良育种以减少症状病的最佳亲本。(C)2008 Elsevier B. V.保留所有权利。
Verticillium wilt (VW), caused by Verticillium dahliae Kleb., is a destructive disease of cotton (Gossypium hirsutum L.). The use of resistant cultivars has long been considered the most practical and effective mean of control. The aim of this work was to study the quantitative genetic basis of Verticillium wilt resistance in Upland cotton by using five genotypes and their possible crosses without reciprocals selecting simultaneously for resistance and desirable agronomic characteristics. Five cotton cultivars and 10 Fls from half-diallel crosses were analyzed for VW resistance. The seed cotton yield, the number of bolls/plant, and boll weight were measured and Verticillium wilt index (VWI) was estimated during two crop seasons in two different sites each year always on plots with naturally infested soil. Genetic components of variance were analyzed using the Hayman model. Analysis of variance for all characters showed significant differences between genotypes, without genotype-site interaction in most cases. Both. additive genetic variance component (D) and dominance genetic variance components (H1 and H2) were presented in all characters, except for VWI. D was the most important component for boll weight and VWI. Boll weight was the most correlated character with seed cotton yield and VWI. Broad sense heritability was high for boll weight and VWI, moderate for seed cotton yield and low for bolls per plant. Narrow sense heritability was moderate for boll weight, and high for VWI.'Victoria'. 'Acala Prema', 'Acala Germain 510' and 'Deltapine 90' were identified as the best parents to increase boll weight. 'Acala Prema', 'Acala Germain 510' and 'Deltapine 90' were the best parents to improve breeding to reduce symptoms disease. (C) 2008 Elsevier B.V. All rights reserved.