Cross-Species Identification of Mendel's I Locus
- 5 January 2007
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 315 (5808), 73
- https://doi.org/10.1126/science.1132912
Abstract
A key gene involved in plant senescence, mutations of which partially disable chlorophyll catabolism and confer stay-green leaf and cotyledon phenotypes, has been identified in Pisum sativum , Arabidopsis thaliana , and Festuca pratensis by using classical and molecular genetics and comparative genomics. A stay-green locus in F. pratensis is syntenically equivalent to a similar stay-green locus on rice chromosome 9. Functional testing in Arabidopsis of a homolog of the rice candidate gene revealed (i) senescence-associated gene expression and (ii) a stay-green phenotype after RNA interference silencing. Genetic mapping in pea demonstrated cosegregation with the yellow/green cotyledon polymorphism ( I/i ) first reported by Gregor Mendel in 1866.Keywords
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