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A Retrotransposon Insertion in GhMML3_D12 Is Likely Responsible for the Lintless Locus li(3) of Tetraploid Cotton

Cotton (Gossypium) seed fibers can be divided into lint (long) or fuzz (very short). Using fiberless (fuzzless-lintless) mutants, the lint initiation gene Li(3) was identified by map-based cloning. The gene is an R2R3-MYB transcription factor located on chromosome D12 (GhMML3_D12). Sequence analysis...

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Autores principales: Chen, Wei, Li, Yan, Zhu, Shouhong, Fang, Shengtao, Zhao, Lanjie, Guo, Yan, Wang, Junyi, Yuan, Li, Lu, Youjun, Liu, Fang, Yao, Jinbo, Zhang, Yongshan
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7725795/
https://www.ncbi.nlm.nih.gov/pubmed/33324436
http://dx.doi.org/10.3389/fpls.2020.593679
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author Chen, Wei
Li, Yan
Zhu, Shouhong
Fang, Shengtao
Zhao, Lanjie
Guo, Yan
Wang, Junyi
Yuan, Li
Lu, Youjun
Liu, Fang
Yao, Jinbo
Zhang, Yongshan
author_facet Chen, Wei
Li, Yan
Zhu, Shouhong
Fang, Shengtao
Zhao, Lanjie
Guo, Yan
Wang, Junyi
Yuan, Li
Lu, Youjun
Liu, Fang
Yao, Jinbo
Zhang, Yongshan
author_sort Chen, Wei
collection PubMed
description Cotton (Gossypium) seed fibers can be divided into lint (long) or fuzz (very short). Using fiberless (fuzzless-lintless) mutants, the lint initiation gene Li(3) was identified by map-based cloning. The gene is an R2R3-MYB transcription factor located on chromosome D12 (GhMML3_D12). Sequence analysis revealed that li(3) is a loss-of-function allele containing a retrotransposon insertion in the second exon that completely blocks the gene’s expression. The genetic loci n(2) and n(3) underlying the recessive fuzzless phenotype in Gossypium hirsutum were also mapped. The genomic location of n(3) overlapped with that of the dominant fuzzless locus N(1), and n(3) appeared to be a loss-of-function allele caused by a single nucleotide polymorphism (SNP) mutation in the coding region of GhMML3_A12. The n(2) allele was found to be co-located with li(3) and originated from G. babardense. n(2) and li(3) are possibly the multiple alleles of the GhMML3_D12 gene. Genetic analysis showed that Li(3) and N(3) are a pair of homologs with additive effects for the initiation of fibers (fuzz or lint). In addition, the presence of another locus was speculated, and it appeared to show an inhibitory effect on the expression of GhMML3. These findings provide new information about the genetic factors affecting the initiation of fibers in cotton.
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spelling pubmed-77257952020-12-14 A Retrotransposon Insertion in GhMML3_D12 Is Likely Responsible for the Lintless Locus li(3) of Tetraploid Cotton Chen, Wei Li, Yan Zhu, Shouhong Fang, Shengtao Zhao, Lanjie Guo, Yan Wang, Junyi Yuan, Li Lu, Youjun Liu, Fang Yao, Jinbo Zhang, Yongshan Front Plant Sci Plant Science Cotton (Gossypium) seed fibers can be divided into lint (long) or fuzz (very short). Using fiberless (fuzzless-lintless) mutants, the lint initiation gene Li(3) was identified by map-based cloning. The gene is an R2R3-MYB transcription factor located on chromosome D12 (GhMML3_D12). Sequence analysis revealed that li(3) is a loss-of-function allele containing a retrotransposon insertion in the second exon that completely blocks the gene’s expression. The genetic loci n(2) and n(3) underlying the recessive fuzzless phenotype in Gossypium hirsutum were also mapped. The genomic location of n(3) overlapped with that of the dominant fuzzless locus N(1), and n(3) appeared to be a loss-of-function allele caused by a single nucleotide polymorphism (SNP) mutation in the coding region of GhMML3_A12. The n(2) allele was found to be co-located with li(3) and originated from G. babardense. n(2) and li(3) are possibly the multiple alleles of the GhMML3_D12 gene. Genetic analysis showed that Li(3) and N(3) are a pair of homologs with additive effects for the initiation of fibers (fuzz or lint). In addition, the presence of another locus was speculated, and it appeared to show an inhibitory effect on the expression of GhMML3. These findings provide new information about the genetic factors affecting the initiation of fibers in cotton. Frontiers Media S.A. 2020-11-26 /pmc/articles/PMC7725795/ /pubmed/33324436 http://dx.doi.org/10.3389/fpls.2020.593679 Text en Copyright © 2020 Chen, Li, Zhu, Fang, Zhao, Guo, Wang, Yuan, Lu, Liu, Yao and Zhang. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Plant Science
Chen, Wei
Li, Yan
Zhu, Shouhong
Fang, Shengtao
Zhao, Lanjie
Guo, Yan
Wang, Junyi
Yuan, Li
Lu, Youjun
Liu, Fang
Yao, Jinbo
Zhang, Yongshan
A Retrotransposon Insertion in GhMML3_D12 Is Likely Responsible for the Lintless Locus li(3) of Tetraploid Cotton
title A Retrotransposon Insertion in GhMML3_D12 Is Likely Responsible for the Lintless Locus li(3) of Tetraploid Cotton
title_full A Retrotransposon Insertion in GhMML3_D12 Is Likely Responsible for the Lintless Locus li(3) of Tetraploid Cotton
title_fullStr A Retrotransposon Insertion in GhMML3_D12 Is Likely Responsible for the Lintless Locus li(3) of Tetraploid Cotton
title_full_unstemmed A Retrotransposon Insertion in GhMML3_D12 Is Likely Responsible for the Lintless Locus li(3) of Tetraploid Cotton
title_short A Retrotransposon Insertion in GhMML3_D12 Is Likely Responsible for the Lintless Locus li(3) of Tetraploid Cotton
title_sort retrotransposon insertion in ghmml3_d12 is likely responsible for the lintless locus li(3) of tetraploid cotton
topic Plant Science
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7725795/
https://www.ncbi.nlm.nih.gov/pubmed/33324436
http://dx.doi.org/10.3389/fpls.2020.593679
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