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Science. 2007 Jan 5;315(5808):73.

Cross-species identification of Mendel's I locus.

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1
Institute of Grassland and Environmental Research, Aberystwyth SY23 3EB, UK. ian.armstead@bbsrc.ac.uk

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.

PMID:
17204643
DOI:
10.1126/science.1132912
[Indexed for MEDLINE]
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