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Acquisition of deleterious mutations during potato polyploidization
Author(s) -
Lian Qun,
Tang Die,
Bai Zhiyan,
Qi Jianjian,
Lu Fei,
Huang Sanwen,
Zhang Chunzhi
Publication year - 2019
Publication title -
journal of integrative plant biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.734
H-Index - 83
eISSN - 1744-7909
pISSN - 1672-9072
DOI - 10.1111/jipb.12748
Subject(s) - biology , solanum tuberosum , inbreeding depression , ploidy , mutation , crop , cultivar , genetics , genome , inbreeding , botany , gene , agronomy , population , demography , sociology
Summary Potatoes ( Solanum tuberosum L.) represent an important tuber crop, worldwide. During its prolonged clonal propagation, numerous deleterious mutations have accumulated in the potato genome, leading to severe inbreeding depression; however, the shaping of this mutation burden during polyploidization and improvement is largely unknown. Here, we sequenced 20 diploid landraces of the Stenotomum group, eight tetraploid landraces, and 20 tetraploid modern cultivars, to analyze variations in their deleterious mutations. We show that deleterious mutations accumulated rapidly during the polyploidization of tetraploid potatoes. This study provides a foundation for future potato improvement.