Stay-green character and its contribution in Brazilian wheats

• Autor(a) principal: Luche,Henrique de Souza
• Data de Publicação: 2017
• Outros Autores: 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
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Ciência Rural
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000100204
• topic: Triticum aestivum; delayed senescence; correlation; path analysis

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.