Stay-green character and its contribution in Brazilian wheats

ABSTRACT: The stay-green character has been related to greater stress tolerance and yield through longer activity of the photosynthetic apparatus. Association of this character with grain yield may be linked to a network of features other than the grain mass. This study aimed to shed light on the actual contribution of stay-green character in Brazilian wheats and the associations between grain yield components in different environmental conditions. The experiment was conducted in a randomized block design with three replications in the years 2003, 2004 and 2005. Sibling lines with and without the stay-green character were evaluated analyzing the phenotypic correlation and path analysis separately by year and maturity group. Under favorable growing conditions, the contribution of stay-green character in wheat is obtained by the increased ear fertility and number of grains. In a more restrictive scenario, it favors an increase in grain mass by longer filling time at the end of the cycle.

Bibliographic Details

Main Authors:	Luche,Henrique de Souza, Silva,José Antônio Gonzalez da, Nornberg,Rafael, Hawerroth,Maraisa Crestani, Silveira,Solange Ferreira da Silveira, Caetano,Vanderlei da Rosa, Santos,Rodrigo Lisboa, Figueiredo,Ricardo Garcia, Maia,Luciano Carlos da, Oliveira,Antônio Costa de
Format:	Digital revista
Language:	English
Published:	Universidade Federal de Santa Maria 2017
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000100204
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