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Genetic analysis of agronomic traits in elite sugarcane (Saccharum spp.) germplasm

文献类型： 外文期刊

作者： Zan, Fenggang 1 ; Zhang, Yuebin 1 ; Wu, Zhuandi 1 ; Zhao, Jun 1 ; Wu, Caiwen 1 ; Zhao, Yong 1 ; Chen, Xuekuan 1 ; Zhao, L 1 ;

作者机构： 1.Yunnan Acad Agr Sci, Yunnan Prov Key Lab Sugarcane Genet Improvement, Sugarcane Res Inst, Kaiyuan, Yunnan, Peoples R China

2.Guangxi Univ, Guangxi Key Lab Sugarcane Biol, Nanning, Guangxi, Peoples R China

3.Univ Florida, Dept Agron, Gainesville, FL 32611 USA

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2020 年 15 卷 6 期

页码：

收录情况： SCI

摘要： Sugarcane (Saccharumspp.) is an important economic crop, supplying up to 80% of the table sugar and similar to 60% of bio-ethanol worldwide. Due to population growth and dwindling fossil-fuel reserves, the demand for sugar and bio-ethanol requires significant improvement in sugarcane production. Breeding sugarcane cultivars with high-performance agronomic traits is undoubtedly the most efficient way to achieve this goal. Therefore, evaluating agronomic traits and dissecting underlying loci are critically important for this aim steps in providing genetic resources and molecular markers for selection. In this study, we assembled a diversity panel of 236 elite sugarcane germplasms originally collected from 12 countries. We evaluated 28 agronomic traits in the diversity panel with three replicates. The diversity panel was genotyped using amplified fragment length polymorphism markers, and a total of 1,359 markers were generated. Through the genome-wide association study, we identified three markers significantly associated with three traits evaluated at a stringent threshold (P< 0.05 after Bonferroni correction). The genotypes of the three associated markers grouped respective trait values into two distinct groups, supporting the reliability of these markers for breeding selection. Our study provides putative molecular markers linked to agronomic traits for breeding robust sugarcane cultivars. Additionally, this study emphasized the importance of sugarcane germplasm introduced from other countries and suggested that the use of these germplasms in breeding programs depends on local industrial needs.

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