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Identification of Heterotic Groups and Patterns Based on Genotypic and Phenotypic Characteristics Among Rice Accessions of Diverse Origins

文献类型： 外文期刊

作者： Hussain, Izhar 1 ; Ali, Sajid 5 ; Liu, Wuge 1 ; Awais, Muhammad 6 ; Li, Jinhua 1 ; Liao, Yilong 1 ; Zhu, Manshan 1 ; Fu, Chongyun 1 ; Liu, Dilin 1 ; Wang, Feng 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Rice Res Inst, Guangzhou, Peoples R China

2.Guangdong Prov Key Lab New Technol Rice Breeding, Guangzhou, Peoples R China

3.Guangdong Rice Engn Lab, Guangzhou, Peoples R China

4.Univ Haripur, Dept Plant Breeding & Genet, Haripur, Pakistan

5.Hazara Univ Mansehra, Dept Agr, Mansehra, Pakistan

6.Northwest A&F Univ, Coll Plant Protect, State Key Lab Crop Stress Biol Arid Areas, Yangling, Peoples R China

关键词： heterotic groups; heterotic patterns; hybrid rice; SNP; accession; genetic distance

期刊名称：FRONTIERS IN GENETICS （ 影响因子：4.772； 五年影响因子：4.933 ）

ISSN：

年卷期： 2022 年 13 卷

页码：

收录情况： SCI

摘要： Identification of the right parental combinations to maximize heterosis is the major goal of hybrid breeding, which could be achieved through identification of heterotic groups. The main objective of this study was to identify promising heterotic groups for future rice breeding programs. A collection of 359 rice genotypes of diverse origins of China and abroad, composed of inbreds, maintainers, restorers, and temperature-sensitive genic male sterile (TGMS) lines were genotyped using 10K SNP chips. The SNP data set was subjected to genomic analyses for estimation of genetic divergence and diversity. Significant variations were observed in the germplasm with the identification of six different genetic groups. These lines were assigned to the genetic groups independent of their origin. Taking an account of commercially used heterotic groups present in each cluster, three cytoplasmic male sterile (CMS) lines and 14 inbred and restorer lines with moderate to high genetic distances selected from five heterotic patterns were crossed and obtained 42 F-1 hybrids. A total of 14 hybrids were found with significant maximum mid- and better-parent heterosis, namely, TaifengA x Guang122, TaifengA x Wushansimiao, and TaifengA x Minghui63 for earliness; Guang8A x Huazhan for dwarf stature; and Guang8A x Huanghuzhan-1, TaifengA x Yuexiangzhan, Guang8A x Minhui3301, TianfengA x Guang122, Guang8A x Yahui2115, TianfengA x Huanghuazhan, TianfengA x Minghui63, TianfengA x Minhui3301, TaifengA x Gui99, and Guang8A x Yuenongsimiao for yield and yield-related traits. Mid-parent and better-parent heterotic F1 hybrids were in positive correlation with the genetic distances as that manifested by commercially used heterotic groups, encouraging the use of genotypic data for identification of heterotic groups. Our study provides an informative strategy for the development of early maturing, lodging resistant and high-yielding commercial hybrids and cultivars in future heterosis breeding programs.

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