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. 2007 Jan 5;315(5808):73.
doi: 10.1126/science.1132912.

Cross-species identification of Mendel's I locus

Ian Armstead  1 , Iain Donnison, Sylvain Aubry, John Harper, Stefan Hörtensteiner, Caron James, Jan Mani, Matt Moffet, Helen Ougham, Luned Roberts, Ann Thomas, Norman Weeden, Howard Thomas, Ian King
Affiliations

Cross-species identification of Mendel's I locus

Ian Armstead et al. Science. .

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.

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