Title:	Estimation of genetic parameters and selection of elephant-grass ( Pennisetum purpureum Schumach.) for forage production using mixed models.
Authors:	STIDA, W. F. DAHER, R. F. VIANA, A. P. VIDAL, A. K. F. FREITAS, R. S. SILVA, V. B. da PEREIRA, A. V. CASSARO, S. MENEZES, B. R. da S. FURLANI, E. P.
Affiliation:	WANESSA F. STIDA, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO ROGÉRIO F. DAHER, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO ALEXANDRE P. VIANA, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO ANA KESIA F. VIDAL, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO RAFAEL S. FREITAS, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO VERÔNICA B. DA SILVA, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO ANTONIO VANDER PEREIRA, CNPGL SABRINA CASSARO, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE DARCY RIBEIRO BRUNA R. DA S. MENEZES, UFRRJ EDUARDO P. FURLANI, UFJF.
Date Issued:	2018
Citation:	Chilean journal of agricultural research, v. 78, n. 2, p. 198-204, 2018.
Description:	The efficient use of fodder and grassland as the basis of animal feed represents a way of raising productivity and reducing production costs. In this scenario, elephant-grass stands out among the most used forages in the intensive animal production systems in the world mainly due to its high productive potential, support capacity and nutritional quality. The purpose of this work was to estimate genetic parameters for the selection of elephant-grass (Pennisetum purpureum Schumach.) clones for forage production in two seasons, a period of water restriction and the total period of study. We evaluated 80 accessions of elephant-grass by means of the mixed-models methodology (REML/BLUP). The evaluation of DM yield (DMY) of the different genotypes were executed in edaphoclimatic conditions in Campos dos Goytacazes, Rio de Janeiro, Brazil. The Selegen-REML/BLUP software accomplished the statistical and genetic analyses. It was seen that the DMY trait was with a low estimate of coefficient of genotypic variation (3.08%), which demonstrates possible difficulties with the selection for this trait. Heritability-coefficient estimate was 0.3606 for the dry season and 0.4193 for the total period. Those results were the variation in that trait due to genetic causes. Although those values may not be considered of high magnitude, they are of great interest for the breeding mainly because it is a polygenic trait. In both periods, genotypes 7, 25, 41, 43, 57, 58, 62, 64, 68, and 77 stood out among the others, since it presented the highest genetic gains for DMY, which will enhance progress in the evaluated trait.
Thesagro:	Pennisetum Purpureum
NAL Thesaurus:	Forage production
Keywords:	Dry matter yield Genetic variability Selective accuracy
DOI:	10.4067/S0718-58392018000200198
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGL)