Comparison of gene expression profiles in cultivated peanut (Arachis hypogaea) under strong artificial selection
文献类型: 外文期刊
作者: Chen, Xiaoping 1 ; Hong, Yanbin 1 ; Zhang, Erhua 1 ; Liu, Haiyan 1 ; Zhou, Guiyuan 1 ; Li, Shaoxiong 1 ; Zhu, Fanghe 1 ;
作者机构: 1.Guangdong Acad Agr Sci, Crops Res Inst, Guangzhou 510640, Guangdong, Peoples R China
2.ARS, Crop Protect & Management Res Unit, USDA, Tifton, GA 31794 USA
3.ARS, USDA, So Reg Res Ctr, New Orleans, LA 70124 USA
关键词: gene expression;microarray;cultivated peanut;articial selection
期刊名称:PLANT BREEDING ( 影响因子:1.832; 五年影响因子:1.956 )
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收录情况: SCI
摘要: Over the past ve decades, cultivated peanut in China has been subjected to strong articial selection in breeding programmes. To investigate the impact of articial selection on expression diversity, we compared gene expression proles in pod and leaf of ve widespread cultivars in Southern China. In terms of tissues, hierarchical clustering analysis revealed that expression data of pod and leaf generated dierent dendrograms owing to articial selection. K-means analysis also showed that there were 16 gene expression patterns in leaf, while only eight in pod. In considering cultivars, a cultivar specicity index (s) was employed to characterize expression patterns, which suggested that genes having 0.15 < s < 0.85 constituted >80% of all expression patterns. Additionally, the diversity of gene expression in pod among cultivars of the YY7 pedigree decreased from 23.8% to 3.9%. Taken together, nucleotide polymorphisms in regulatory elements owing to articial selection led to low-expression polymorphisms in both tissues and cultivars, contributed to the narrow genetic diversity and might be a driving force behind the breeding of cultivated peanut.
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