Insertion of a transposable element in Less Shattering1 (SvLes1) gene is not always involved in foxtail millet (Setaria italica) domestication

Recently, the less Shattering1 gene ( SvLes1 ), an MYB transcription factor on chromosome V, in Setaria viridis , was reported to control the degree of seed shattering within S. viridis. SvLes1-1 and SvLes1-2 are the wild type (high shattering) allele and the reduced shattering allele, respectively....

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Published in:Genetic resources and crop evolution 2021-10, Vol.68 (7), p.2923-2930
Main Authors: Fukunaga, Kenji, Matsuyama, Sarasa, Abe, Akira, Kobayashi, Michie, Ito, Kazue
Format: Article
Language:English
Subjects:
Agriculture
Alleles
Biomedical and Life Sciences
Chromosome 5
Domestication
Geographical distribution
Insertion
Life Sciences
Millet
Phenotypes
Plant Genetics and Genomics
Plant Physiology
Plant Sciences
Plant Systematics/Taxonomy/Biogeography
Research Article
Setaria italica
Transposons
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Summary:Recently, the less Shattering1 gene ( SvLes1 ), an MYB transcription factor on chromosome V, in Setaria viridis , was reported to control the degree of seed shattering within S. viridis. SvLes1-1 and SvLes1-2 are the wild type (high shattering) allele and the reduced shattering allele, respectively. In addition to these two alleles, the loss-of-function allele through a transposable-element (TE) insertion in exon 2 was found in foxtail millet, a domesticated type of S. viridis, and was designated as SiLes1-TE. This gene is considered to be a domestication gene in foxtail millet. We screened 131 accessions of foxtail millet and found that 16 landraces (12.2%) of foxtail millet do not have the TE, despite expression of the non-shattering phenotype. We sequenced the SvLes1 gene of these 16 accessions and classified them into three alleles, SvLes1-1 , SvLes1-2 , and a new allele, SvLes1-3 . The geographical distribution of these three alleles was different, suggesting that foxtail millet domestication and differentiation are more complex than expected.
ISSN:0925-9864
1573-5109
DOI:10.1007/s10722-021-01165-w