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Inheritance of steroidal glycoalkaloids in potato tuber flesh

作  者:
Peng Zhen;Wang Pei;Tang Die;Shang Yi;Li Can-hui;Huang San-wen;Zhang Chun-zhi
单  位:
Yunnan Normal Univ, CAAS YNNU Joint Acad Potato Sci, Kunming 650500, Yunnan, Peoples R China;Chinese Acad Agr Sci, Agr Genom Inst Shenzhen, Genome Anal Lab, Minist Agr & Rural Affairs, Shenzhen 518124, Peoples R China;Chinese Acad Agr Sci, Key Lab Biol & Genet Improvement Hort Crops, Sino Dutch Joint Lab Hort Genom, Inst Vegetables & Flowers,Minist Agr & Rural Affa, Beijing 100081, Peoples R China
关键词:
steroidal glycoalkaloids;domestication;tuber flesh;QTL mapping
摘  要:
Potato (Solanum tuberosum L.) is the third most important food crop worldwide after wheat and rice in terms of human consumption. A critical domestication trait for potato was the decrease of toxic steroidal glycoalkaloids (SGAs) in tuber flesh. Here, we used a diploid F-2 segregating population derived from a cross between S. tuberosum and the wild potato species Solanum chacoense to map the quantitative trait loci (QTLs) associated with the regulation of SGAs content in tuber flesh. In a three-year study, we identified two QTLs on chromosomes 2 and 8 affecting SGAs content in tuber flesh. The QTL on chromosome 8 harbors 38 genes that are co-expressed with the GLYCOALKALOID METABOLISM genes. These findings lay the foundation for exploiting the genes controlling SGAs content in tuber flesh and they provide a theoretical basis for the use of wild germplasm in potato breeding.

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