ESTIMATION OF HETEROSIS AND COMBINING ABILITY FOR YIELD AND FIBER QUALITY TRAITS BY USING LINE X TESTER ANALYSIS IN COTTON (Gossypium barbadense L.)
ESTIMATION OF HETEROSIS AND COMBINING ABILITY FOR YIELD AND FIBER QUALITY TRAITS BY USING LINE X TESTER ANALYSIS IN COTTON (Gossypium barbadense L.)
复制标题
通过使用 Line X 测试仪分析棉花（海岛棉）来估计杂种优势以及产量和纤维质量性状的配合能力
DOI：
10.21608/mjppf.2021.169080
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
S. Said
中科院分区：
文献类型：
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作者：
H. Hamed;S. Said
本研究于2019年和2020年在埃及农业研究中心棉花研究所种子农业研究站进行。以6个埃及棉花品种吉萨80、吉萨86、吉萨90、吉萨93、吉萨94和吉萨95为供试品系，以Karshenky、uitaly 13和Pima S4为供试品系，采用系x检验分析方法，估算了部分性状的杂种优势、配合力、比例贡献、遗传成分和遗传力。2020年，采用3个重复的随机完全区组设计，对所有基因型（9个亲本及其18个f1杂交组合）的部分遗传参数进行评价。结果表明：基因型、亲本、亲本vs杂交、杂交、品系、亲本和x系的均方根均极显著，但x系的棉铃重、种子指数、皮棉指数和纤维强度均极显著。吉萨80 × Karashenky、吉萨86 × uitaly 13和吉萨86 × Pima S4在大多数产量性状上表现出最好的杂种优势，吉萨93 × Karashenky和吉萨93 × uitaly 13在大多数纤维品质性状上表现出最好的杂种优势。结果表明，吉萨86和吉萨94在大多数产量性状上均表现出显著的正GCA效应。吉萨93在所有纤维性状上均具有显著的理想GCA效应，在这方面，试验结果表明，皮马S4在某些产量和纤维性状上具有显著的理想GCA效应。然而，吉萨86 ×乌斯利13、吉萨90 ×皮马S4、吉萨93 × Karshenky和吉萨95 ×皮马S4的特定配合力（SCA）效应对大多数产量性状具有显著的理想SCA效应，而吉萨90 ×皮马S4、吉萨93 × Karshenky和吉萨95 ×皮马S4对大多数纤维性状具有显著的理想SCA效应。结果表明，各品系的比例贡献均大于品系x互作贡献和品系的比例贡献。除衣分、种子指数、衣分指数和上半平均值外，遗传参数的非加性遗传方差均大于加性遗传方差。UHM的广义遗传力最高，为88.47%，纤维强度最低，为32.24%，而铃重和上半平均的狭义遗传力分别为8.04% ~ 49.03%。一般来说，吉萨86和吉萨94可以作为高产品种的选育方案，而吉萨93可以作为优良亲本选育方案，选育具有最佳纤维性能的新品种。
The present study was carried out at Seds Agricultural Research Station, Cotton Research Institute, Agricultural Research Center, Egypt, during 2019 and 2020 seasons. This investigation was carried out to estimate heterosis, combining ability, proportional contributions, genetic components and heritability estimates of some characters for six Egyptian cotton varieties as lines i.e, Giza 80, Giza 86, Giza 90, Giza 93, Giza 94 and Giza 95, while, the other three genotypes used as testers were Karshenky, Ustraly 13 and Pima S4, using line x tester analysis. In 2020 season a randomized complete block design with three replications was carried to evaluate all genotype (nine parents and their 18 F1s crosses) for some genetic parameters. The results indicated that mean squares due to the genotypes, parents, parents vs. crosses, crosses, lines, testers and Line x Tester were highly significant for all studied traits, except boll weight, seed index and lint index at tester and fiber strength for Line x Tester. The following crosses demonstrated the best heterosis relative to mid- and better-parent, i.e, Giza 80 x Karashenky, Giza 86 x Ustraly 13 and Giza 86 x Pima S4 for most yield studied traits and the crosses Giza 93 x Karashenky and Giza 93 x Ustraly 13 for most fiber quality traits. The results revealed that the lines Giza 86 and Giza 94 were significant and positive desirable GCA effects for most yield traits. Giza 93 had significant desirable GCA effects for all fiber traits, in this respect, the results of testers showed that Pima S4 had significant desirable for some yield and fiber traits. However, estimates of specific combining ability (SCA) effects for crosses Giza 86 x Ustraly 13, Giza 90 x Pima S4, Giza 93 x Karshenky and Giza 95 x Pima S4 were significant desirable SCA effects for most yield traits, while, the crosses Giza 90 x Pima S4, Giza 93 x Karshenky and Giza 95 x Pima S4 were significant desirable SCA effects for most fiber traits. The results showed that proportion contribution of lines was higher than of lines x tester interaction contribution and testers for all studied traits. The non-additive of genetic parameters was larger than additive genetic variance with respect to all studied traits except lint percentage, seed index, lint index and upper half mean. The highest broad sense heritability estimates was observed in case of UHM with values of 88.47% and the lowest was for fiber strength with value of 32.24%, while for narrow sense heritability, it was ranged from 8.04% to 49.03% for boll weight and upper half mean, respectively. Generally, Giza 86 and Giza 94 could be used in breeding programs for improving high yielding varieties, while Giza 93 could be considered as excellent parent for breeding programs to produce new varieties characterized with best fiber properties.