<b>Repeatability, number of harvests, and phenotypic stability of dry matter yield and quality traits of Panicum maximum jacq.

  • Francisco Duarte Fernandes Empresa Brasileira de Pesquisa Agropecuária
  • Gustavo José Braga Empresa Brasileira de Pesquisa Agropecuária
  • Allan Kardec Braga Ramos Empresa Brasileira de Pesquisa Agropecuária
  • Liana Jank Empresa Brasileira de Pesquisa Agropecuária
  • Marcelo Ayres Carvalho Empresa Brasileira de Pesquisa Agropecuária
  • Giovana Alcântara Maciel Empresa Brasileira de Pesquisa Agropecuária
  • Claudio Takao Karia Empresa Brasileira de Pesquisa Agropecuária
  • Carlos Eduardo Lazarini Fonseca Empresa Brasileira de Pesquisa Agropecuária http://orcid.org/0000-0001-8482-0839

Resumo

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.

 

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Biografia do Autor

Carlos Eduardo Lazarini Fonseca, Empresa Brasileira de Pesquisa Agropecuária
Melhoramento Genético de Forrageiras - Andropogon gayanus
Publicado
2017-04-03
Como Citar
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. (2017). <b&gt;Repeatability, number of harvests, and phenotypic stability of dry matter yield and quality traits of Panicum maximum jacq. Acta Scientiarum. Animal Sciences, 39(2), 149-155. https://doi.org/10.4025/actascianimsci.v39i2.32915
Seção
Forragicultura

0.9
2019CiteScore
 
 
29th percentile
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