Title:	Repeatability, number of harvests, and phenotypic stability of dry matter yield and quality traits of Panicum maximum jacq.
Authors:	FERNANDES, F. D. BRAGA, G. J. RAMOS, A. K. B. JANK, L. CARVALHO, M. A. MACIEL, G. A. KARIA, C. T. FONSECA, C. E. L. da
Affiliation:	FRANCISCO DUARTE FERNANDES, CPAC; GUSTAVO JOSE BRAGA, CPAC; ALLAN KARDEC BRAGA RAMOS, CPAC; LIANA JANK, CNPGC; MARCELO AYRES CARVALHO, CPAC; GIOVANA ALCANTARA MACIEL, CPAC; CLAUDIO TAKAO KARIA, CPAC; CARLOS EDUARDO LAZARINI DA FONSECA, CPAC.
Date Issued:	2017
Citation:	Acta Scientiarum. Animal Sciences, Maringá, v. 39, n. 2, p. 149-155, April-June, 2017.
Description:	Selection of superior forage genotypes is based on agronomic traits assayed in repeated measures. The questions are how repeatable the performance of individual genotypes is and how many harvests are needed to select the best genotypes. The objectives were to estimate repeatability coefficients of dry matter yield (DMY) and forage quality, their phenotypic stability and the number of harvests needed for an accurate selection. Two randomized complete block design experiments data with 24 genotypes each, undergoing 12 and 16 harvests, over a period of 2 and 3 years, respectively, were used. The DMY repeatability estimates ranged from 0.42 to 0.55, suggesting a low heritability. The mean numbers of repeated measures were 5 and 7 harvests for 0.80 and 0.85 accuracy, respectively. The inclusion of the first two harvests negatively affects the estimates. Repeatability for quality traits ranged from 0.30 to 0.69, indicating low to moderate heritability.
Thesagro:	Panicum maximum Genótipo Pastagem Pastejo Matéria seca
NAL Thesaurus:	Megathyrsus maximus Cultivars Grazing
Keywords:	Repeated measures Selection efficiency Selection effectiveness Medida repetida Eficiência de seleção Eficácia de seleção
Notes:	Título em português: Repetibilidade, número de colheitas e estabilidade fenotípica da produção de matéria seca e de características de qualidade de Panicum maximum jacq.
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGC)