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Cross-Species Identification of Mendel's I Locus

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


Ian Armstead

Iain Donnison

Sylvain Aubry

John Harper

Stefan Hortensteiner

Caron James

Jan Mani

Matt Moffet

Helen Ougham

Luned Roberts

Ann Thomas

Norman Weeden

Howard Thomas


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.


Armstead, I., Donnison, I., Aubry, S., Harper, J., Hortensteiner, S., James, C., …King, I. (2007). Cross-Species Identification of Mendel's I Locus. Science, 315(5808), 73-73.

Journal Article Type Article
Acceptance Date Oct 16, 2006
Publication Date Jan 5, 2007
Deposit Date Dec 6, 2018
Journal Science
Print ISSN 0036-8075
Electronic ISSN 1095-9203
Publisher American Association for the Advancement of Science
Peer Reviewed Peer Reviewed
Volume 315
Issue 5808
Pages 73-73
Public URL
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