Line × Tester Analysis for Yield and Fiber Quality Traits in Egyptian Cotton under Heat Conditions
Line × Tester Analysis for Yield and Fiber Quality Traits in Egyptian Cotton under Heat Conditions
复制标题
热条件下埃及棉产量和纤维品质性状的线×测试仪分析
DOI：
10.21608/jpp.2018.36358
复制
发表时间：
2018
期刊：
影响因子：
--
通讯作者：
H. Mahrous,
中科院分区：
文献类型：
--
作者：
H. Mahrous,
本研究利用Line x Tester分析方法，对8个埃及棉品种及其F1杂交种在2016年和2017年两个季节在上埃及高温条件下的表现进行了评价。此外，还确定了控制产量和纤维性状的配合力、杂种优势和基因作用。在索哈省尚达维尔农业研究站对8个埃及棉花基因型和15个杂交组合进行了评估。方差分析表明，除亲本衣分和双亲衣分与杂交组合的衣分差异不显著外，其余性状均达到显著或极显著水平。由线条或测试仪引起的均方差(G.C.A.)对大多数研究性状都是显著或极显著的。线路x测试仪(S.C.A.)主方差对大多数产量性状具有极显著意义，而品系x Tester(S.C.A.)对所有纤维品质性状进行了均方检验。在平均生产性能和杂种优势方面，吉杂90、吉杂95和吉杂86是产量最高的亲本，在高温条件下能产生高产组合，吉杂45和吉杂92是产生最好纤维品质组合的优良亲本。杂种优势分析结果还表明，(吉杂80×吉杂90)、(吉杂86×吉杂90)、(吉杂86×吉杂95)、(吉杂87×吉杂90)、(吉杂45×(吉杂90澳大利亚))、(吉杂92×吉杂90)等7个组合在籽棉产量、皮棉单株产量和单株铃数上具有极显著的正向优势，其中吉杂92×吉杂95具有较好的产量和纤维性状。籽棉、皮棉单株产量、单株铃数和籽指的最佳组合是吉杂86，纤维细度、纤维强力和纤维长度的最佳组合是吉杂45和吉杂92。吉杂90是籽棉单株产量和皮棉单株产量的最佳组合。4个组合的特殊配合力(S.C.A.)均为正值且达显著水平。对籽棉单株产量、皮棉单株产量、衣分和单株铃数的影响。各产量性状的非加性遗传方差均大于加性遗传方差，所有纤维品质性状的加性遗传方差均大于显性遗传方差。所有性状的广义遗传力(Hb%)均高于狭义遗传力(Hn%)，所有纤维性状的狭义遗传力估计值均较高。
This research was carried out to evaluate the performance of eight Egyptian cotton genotypes and their F1 hybrids under Upper Egypt heat conditions using Line x Tester analysis, during 2016 and 2017 seasons. In addition, to determine the combining ability, heterosis and gene action which control yielding ability and fiber traits. Eight Egyptian cotton genotypes and 15 crosses were evaluated at Shandaweel Agricultural Research Station, Sohag governorate. Analysis of variance indicated that genotypes, parents, crosses and parents vs. crosses were significant or highly significant for all the studied traits, except lint percentage in parents and parents vs. crosses, which were insignificant. The mean squares due to lines or tester (G.C.A.) were significant or highly significant for most of the studied traits. Line x Tester (S.C.A.) main squares was highly significant for most yield traits, while insignificant Line x Tester (S.C.A.) mean squares were found for all fiber quality traits. Regarding mean performance and heterosis, the varieties Giza 90, Giza 95 and Giza 86 were the best parents in yielding ability and gave high yielding crosses under heat conditions, while Giza 45 and Giza 92 were the good parents to produce the best fiber quality crosses. The results of heterosis also showed that seven crosses had positive and highly significant heterosis based on mid-parents in seed and lint cotton yield /plant and number of bolls/plant i.e., (Giza 80 x Giza 90), (Giza 86 x Giza 90), (Giza 86 x Giza 95), (Giza 87 x Giza 90), (Giza 45 x (Giza 90 x Australian)), and (Giza 92 x Giza 90), while the cross (Giza 92 x Giza 95) had better yield and fiber traits. The line Giza 86 was the best combiner for seed and lint cotton yield/plant, number of bolls/plant and seed index, while lines Giza 45 and Giza 92 were the best combiners for fiber fineness, fiber strength and fiber length. The tester Giza 90 was the best combiner for seed cotton yield/plant and lint cotton yield/plant. Four crosses exhibited positive and significant values of specific combining ability (S.C.A.) effects for seed cotton yield/plant, lint cotton yield/plant, lint percentage and number of bolls/plant. The non-additive of genetic variance was larger than additive genetic variance in all yielding ability traits and additive genetic variance was higher than dominance variance for all fiber quality traits. Broad sense heritability (Hb%) was higher than narrow sense heritability (Hn%) for all traits and high heritability estimates in narrow sense were found for all fiber traits.