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Titolo:
The rice R gene family: two distinct subfamilies containing several miniature inverted-repeat transposable elements
Autore:
Hu, JP; Reddy, VS; Wessler, SR;
Indirizzi:
Univ Georgia, Dept Bot, Athens, GA 30602 USA Univ Georgia Athens GA USA 30602 Georgia, Dept Bot, Athens, GA 30602 USA Univ Georgia, Dept Genet, Athens, GA 30602 USA Univ Georgia Athens GA USA30602 eorgia, Dept Genet, Athens, GA 30602 USA
Titolo Testata:
PLANT MOLECULAR BIOLOGY
fascicolo: 5, volume: 42, anno: 2000,
pagine: 667 - 678
SICI:
0167-4412(200003)42:5<667:TRRGFT>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
REGULATORY GENES; TRANSCRIPTIONAL ACTIVATORS; ANTHOCYANIN PRODUCTION; MAIZE TISSUES; EVOLUTION; EXPRESSION; SEQUENCES; GENOMES; PLANTS; RETROTRANSPOSONS;
Keywords:
anthocyanin; gene family; genome evolution; rice; transposable element;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Wessler, SR Univ Georgia, Dept Bot, Athens, GA 30602 USA Univ Georgia Athens GA USA 30602 pt Bot, Athens, GA 30602 USA
Citazione:
J.P. Hu et al., "The rice R gene family: two distinct subfamilies containing several miniature inverted-repeat transposable elements", PLANT MOL B, 42(5), 2000, pp. 667-678

Abstract

The R and B genes of maize regulate the anthocyanin biosynthetic pathway and constitute a small gene family whose evolution has been shaped by polyploidization and transposable element activity. To compare the evolution of regulatory genes in the distinct but related genomes of rice and maize, we previously isolated two R homologues from rice (Oryza sativa). The Ra1 gene on chromosome 4 can activate the anthocyanin pathway, whereas the Rb gene, of undetermined function, maps to chromosome 1. In this study, rice R geneshave been further characterized. First, we found that an Rb cDNA can induce pigmentation in maize suspension cells. Second, another rice R homologue (Ra2) was identified that is more closely related to Ra1 than to Rb. Domesticated rice and its wild relatives harbor multiple Ra-like and Rb-like genes despite the fact that rice is a true diploid with the smallest genome of all the grass species analyzed to date. Finally, several miniature inverted-repeat transposable elements (MITEs) were found in R family members. Theirpossible role in hastening the divergence of R genes is discussed.

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Documento generato il 26/01/21 alle ore 04:43:07