Comparison of gene expression profiles in cultivated peanut (Arachis hypogaea) under strong artificial selection

Chen, X. and Hong, Y. and Zhang, E. and et al, . (2012) Comparison of gene expression profiles in cultivated peanut (Arachis hypogaea) under strong artificial selection. Plant Breeding, 131 (5). pp. 620-630.

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Over the past five decades, cultivated peanut in China has been subjected to strong artificial selection in breeding programmes. To investigate the impact of artificial selection on expression diversity, we compared gene expression profiles in pod and leaf of five widespread cultivars in Southern China. In terms of tissues, hierarchical clustering analysis revealed that expression data of pod and leaf generated different dendrograms owing to artificial 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 specificity index (τ) was employed to characterize expression patterns, which suggested that genes having 0.15 < τ < 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 artificial 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

Item Type: Article
Additional Information: This research was funded by grants from National Natural Science Foundation of China (No. 30971819 and 30900907), Natural Science Foundation of Guangdong Province (No. 10151064001000002), Science and Technology Planning Project of Guangdong Province (2011B010500019) and Pearl River Science and Technology Nova of Guangzhou (No. 2011J2200035) and supported by the earmarked fund for Modern Agro-industry Technology Research System (No. nycycx- 19).
Uncontrolled Keywords: Gene expression; Microarray; Cultivated peanut; Artificial selection
Author Affiliation: Crops Research Institute, Guangdong Academy of Agricultural Sciences, Guangzhou 510640, China
Subjects: Statistics and Experimentation > Experimentation
Crop Improvement
Divisions: Groundnut
Depositing User: Ms Ishrath Durafsha
Date Deposited: 17 Jun 2014 10:36
Last Modified: 17 Jun 2014 10:36
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