2016 journal article
Modifications to a LATE MERISTEM IDENTITY1 gene are responsible for the major leaf shapes of Upland cotton (Gossypium hirsutum L.)
Proceedings of the National Academy of Sciences of the United States of America, 114(1), E57–66.
TL;DR:
It is shown that the major leaf shapes of cotton at the L-D1 locus are controlled by a HD-Zip transcription factor most similar to Late Meristem Identity1 (LMI1) gene, and that sub-okra is the ancestral leaf shape of tetraploid cotton and normal is a derived mutant allele that came to predominate and define the leafshape of cultivated cotton.
(via Semantic Scholar)
open access via www.biorxiv.org (publisher PDF)
UN Sustainable Development Goal Categories
2. Zero Hunger
(OpenAlex)
Source: NC State University Libraries
Added: August 6, 2018
AbstractLeaf shape is spectacularly diverse. As the primary source of photo-assimilate in major crops, understanding the evolutionary and environmentally induced changes in leaf morphology are critical to improving agricultural productivity. The role of leaf shape in cotton domestication is unique, as breeders have purposefully selected for entire and lobed leaf morphs resulting from a single locus,okra(L-D1). Theokralocus is not only of agricultural importance in cotton (Gossypium hirsutumL.), but through pioneering chimeric and morphometric studies it has contributed to fundamental knowledge about leaf development. Here we show that the major leaf shapes of cotton at theL-D1locus are controlled by a HD-Zip transcription factor most similar toLate Meristem Identity1 (LMI1)gene. The classicalokraleaf shape gene has133-bp tandem duplication in the promoter, correlated with elevated expression, while an 8-bp deletion in the third exon of the presumed wild-typenormalleaf causes a frame-shifted and truncated coding sequence. Virus-induced gene silencing (VIGS) of thisLMI1-likegene in anokravariety was sufficient to induce normal leaf formation. An intermediate leaf shape allele,sub-okra, lacks both the promoter duplication and the exonic deletion. Our results indicate thatsub-okrais the ancestral leaf shape of tetraploid cotton andnormalis a derived mutant allele that came to predominate and define the leaf shape of cultivated cotton.