首页|Identification of SSR markers linked to the abscission of cotton boll traits and mining germplasm in Cotton

Identification of SSR markers linked to the abscission of cotton boll traits and mining germplasm in Cotton

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Background Cotton is an economically important crop.It is crucial to find an effective method to improve cot-ton yield,and one approach is to decrease the abscission of cotton bolls and buds.However,the lack of knowl-edge of the genetic and molecular mechanisms underlying cotton boll abscission traits has hindered genetic improvements.Results Pearson's correlation analysis revealed a significant positive correlation between boll abscission rates 1(AR1)and boll abscission rates 2(AR2).A genome-wide association study was conducted on 145 loci that exhibited high polymorphism and were uniformly distributed across 26 chromosomes(pair).The study revealed 18,46,and 62 markers that were significantly associated with boll abscission,fiber quality,and yield traits(P＜0.05),explaining 1.75％-7.13％,1.16％-9.58％,and 1.40％-5.44％of the phenotypic variation,respectively.Notably,the marker MON_SHIN-1584b was associated with the cotton boll abscission trait,whereas MON_CGR5732a was associated with cotton boll abscission and fiber quality traits.Thirteen of the marker loci identified in this study had been previously reported.Based on phenotypic effects,six typical cultivars with elite alleles related to cotton boll abscission,fiber quality,and yield traits were identified.These cultivars hold great promise for widespread utilization in breeding programs.Conclusions These results lay the foundation for understanding the molecular regulatory mechanism of cotton boll abscission and provide data for the future improvement of cotton breeding.

SSRGenome wide association studiesAbscissionFavorable allelesCottonGenetic improvement

SHUI Guangling、LIN Hairong、MA Xiaomei、ZHU Bo、HAN Peng、AINI Nurimanguli、GUO Chunping、WU Yuanlong、PAN Zhenyuan、YOU Chunyuan、SONG Guoli、NIE Xinhui

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Key Laboratory of Oasis Ecology Agricultural of Xinjiang Bingtuan,Agricultural College,Shihezi University,Shihezi,Xinjiang 832003,China

Cotton Institute,Xinjiang Academy of Agriculture and Reclamation Science,Shihezi,Xinjiang 832000,China

Agricultural Science Research Institute of the 5th Division of Xinjiang Production and Construction Corps,Shuanghe,Xinjiang 833408,China

Modern Agricultural College,Kashi University,Kashi,Xinjiang 844000,China

National Key Laboratory of Crop Genetic Improvement,College of Plant Sciences & Technology,Huazhong Agricultural University,Wuhan,Hubei 430070,China

National Key Laboratory of Cotton Bio-Breeding and Integrated Utilization,Institute of Cotton Research,Chinese Academy of Agricultural Sciences,Anyang,Henan 455000,China

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2024

10.1186/s42397-024-00180-3

棉花研究(英文)
中国农业科学院棉花研究所,中国农学会

棉花研究(英文)

ISSN：2096-5044
年,卷(期)：2024.7(4)