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Titolo:
THE EVOLUTION OF APICAL DOMINANCE IN MAIZE
Autore:
DOEBLEY J; STEC A; HUBBARD L;
Indirizzi:
UNIV MINNESOTA,DEPT PLANT BIOL ST PAUL MN 55108 UNIV CALIF BERKELEY,USDA,CTR PLANT GENE EXPRESS ALBANY CA 94710 UNIV CALIF BERKELEY,DEPT PLANT BIOL BERKELEY CA 94720
Titolo Testata:
Nature
fascicolo: 6624, volume: 386, anno: 1997,
pagine: 485 - 488
SICI:
0028-0836(1997)386:6624<485:TEOADI>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
TEOSINTE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
14
Recensione:
Indirizzi per estratti:
Citazione:
J. Doebley et al., "THE EVOLUTION OF APICAL DOMINANCE IN MAIZE", Nature, 386(6624), 1997, pp. 485-488

Abstract

The domestication of crop plants has often involved an increase in apical dominance (the concentration of resources in the main stem of theplant and a corresponding suppression of axillary branches)(1). A striking example of this phenomenon is seen in maize (Zea mays spp. mays), which exhibits a profound increase in apical dominance compared withits probable wild ancestor, teosinte (Zea mays ssp. parviglumis)(2). Previous research has identified the teosinte branched1 (tb1) gene as a major contributor to this evolutionary change in maize(3). We have cloned tb1 by transposon tagging and show here that it encodes a protein with homology to the cycloidea gene of snapdragon(4). The pattern oftb1 expression and the morphology of tb1 mutant plants suggest that tb1 acts both to repress the growth of axillary organs and to enable the formation of female inflorescences. The maize allele of tb1 is expressed at twice the level of the teosinte allele, suggesting that gene regulatory changes underlie the evolutionary divergence of maize from teosinte.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/07/20 alle ore 22:13:19