Comparative performance of hybrid generations reveals the potential application of F2 hybrids in upland cotton

IF 4.3 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

ACS Applied Electronic Materials Pub Date : 2022-02-08 DOI:10.21203/rs.3.rs-1310801/v1

Liangliang Chen, Huini Tang, Xuexian Zhang, Tingxiang Qi, Li-ping Guo, Kashif Shahzad, Hailin Wang, Xiuqin Qiao, R. Zang, Meng Zhang, Jianyong Wu, C. Xing

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引用次数: 3

Abstract

Background The utilization of heterosis has greatly improved the productivity of cotton worldwide. However, a major constraint for the large-scale promotion of F 1 hybrid cotton is artificial emasculation and pollination. This study proposed the potential utilization of F 2 hybrids to improve upland cotton production through a comparative evaluation of hybrid generations. Results Eight upland cotton varieties were analyzed and crosses were made according to NCII incomplete diallel cross-breeding design in two cotton belts of China. Variance analysis revealed significant differences in agronomic, yield, and fiber quality in both generations and environments. The broad-sense heritability of agronomic and yield traits was relatively higher than quality traits. Furthermore, the narrow-sense heritability of some traits was higher in F 2 than in the F 1 generation in both cotton belts. Overall, parental lines Zhong901, ZB, L28, and Z98 were observed with maximum combining ability while combinations with strong special combining ability were ZB × DT, L28 × Z98, and ZB × 851. The yield traits heterosis was predominant in both generations. However, the level of heterosis was altered with trait, hybrid combination, generation, and environment. Interestingly, L28 × Z98 performed outstandingly in Anyang. Its lint yield (LY) was 24.2% higher in F 1 and 11.6% in F 2 than that of the control Ruiza 816. The performance of SJ48 × Z98 was excellent in Aral which showed 36.5% higher LY in F 1 and 10.9% in F 2 than control CCRI 49. Further results revealed most hybrid combinations had shown a low level of heterosis for agronomic and fiber quality traits in both generations. Comparatively, ZB × DT and L28 × Z98 showed hybrid vigor for multiple traits in both generations and cotton belts. It is feasible to screen strong heterosis hybrid combinations with fine fiber in early generations. In the two environments, the correlation of some traits showed the same trend, and the correlation degree of Anyang site was higher than that of Aral site, and the correlation of some traits showed the opposite trend. According to the performance of strong heterosis hybrid combinations in different environments, the plant type, yield and fiber traits associated with them can be improved according to the correlation. Conclusions Through comparative analysis of variance, combining ability, and heterosis in F 1 and F 2 hybrids in different cotton belts, this study proposed the potential utilization of F 2 hybrids to improve upland cotton productivity in China.

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杂种世代性能比较揭示了F2杂交种在陆地棉上的应用潜力

背景杂种优势的利用极大地提高了世界范围内棉花的生产力。然而，制约一号杂交棉大规模推广的主要因素是人工去雄和授粉。本研究通过杂交世代的比较评价，提出f2杂交种在提高陆地棉产量方面的利用潜力。结果对8个陆地棉品种进行分析，并按NCII不完全双列杂交设计在中国2个棉带进行杂交。方差分析显示，在不同世代和不同环境中，农艺性状、产量和纤维品质均存在显著差异。农艺性状和产量性状的广义遗传力相对高于品质性状。2个棉带中f2代部分性状的狭义遗传力高于f1代。综上所述，亲本中901、ZB、L28和Z98配合力最强，特殊配合力较强的组合为ZB × DT、L28 × Z98和ZB × 851。两代产量性状均以杂种优势为主。杂种优势水平随性状、杂交组合、世代和环境的变化而变化。有趣的是，L28 × Z98在安阳的表现非常出色。与对照瑞沙816相比，1期和2期皮棉产量分别提高24.2%和11.6%。SJ48 × Z98在咸海中表现优异，其f1和f2的LY分别比对照CCRI 49高36.5%和10.9%。进一步的结果表明，大多数杂交组合在两代间均表现出较低的农艺和纤维品质杂种优势。相比之下，ZB × DT和L28 × Z98在两代和棉带上均表现出多性状杂交优势。早代筛选细纤维强杂种优势组合是可行的。在两种环境中，部分性状的相关性呈现相同趋势，安阳样地的相关性高于咸海样地，部分性状的相关性呈现相反趋势。根据强杂种优势组合在不同环境下的表现，可以根据相关性提高与之相关的株型、产量和纤维性状。结论通过对f1和f2杂交种在不同棉花带上的方差、配合力和杂种优势进行比较分析，提出f2杂交种在提高中国陆地棉生产力方面的潜在利用价值。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567