Título:	Genetic and environmental contributions to increased wheat yield in Minas Gerais, Brazil.
Autor:	CARGNIN, A. SOUZA, M. A. de FRONZA, V. FOGAÇA, C. M.
Afiliación:	ADELIANO CARGNIN, CNPT MOACIL ALVES DE SOUZA, UNIVERSIDADE FEDERAL DE VIÇOSA VANOLI FRONZA, CNPSO CLÁUDIA MARTELLET FOGAÇA.
Año:	2009
Referencia:	Scientia Agrícola (Piracicaba, Braz.), v. 66, n. 3, p. 317-322, May/June 2009.
Descripción:	Producers need wheat cultivars adapted to the predominant climate conditions of the end of the rainy period. Having this in mind, EPAMIG (Agriculture and Livestock Research Institute of Minas Gerais) has been developing a wheat genetic improvement program since 1976, and the estimates of the genetic improvement established by the breeding programs could be useful to quantify their efficiency. This study focused on the quantification of the genetic progress achieved by these improvement programs of dryland wheat in the Brazilian-savanna between 1976 and 2005. The efficiency of these programs was evaluated based on grain yield data of VCU (Value for Cultivation and Use) trials conducted at ten locations in the Minas Gerais State, Brazil. The mean estimated genetic progress for mean grain yield between 1976 and 2005 was 37 kg ha-1 year-1. The genetic yield gain in the study period indicates that the improvement programs of dryland wheat in the Brazilian-savanna are effective. Besides the marked contribution of genetic gain, the environmental and technological improvements were also relevant for the yield, accounting for 47.4% of the total progress in the period. The improvement programs of dryland wheat resulted in a genotype renovation rate of 35% over the years.
NAL Thesaurus:	wheat
Palabras clave:	Triticum aestivum L Genetic breeding Genotype evaluation
DOI:	https://doi.org/10.1590/S0103-90162009000300006
Notas:	Título em português: Contribuições genéticas e ambientais para aumento do rendimento do trigo em Minas Gerais, Brasil.
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CPAC)