Todos os textos, informa??es e resultados apresentados s?o de inteira responsabilidade dos autores.Objetivou-se com este trabalho estimar par?metros gen?ticos de caracter?sticas morfog?nicas em acessos de
Panicum maximum. Foram avaliados 17 acessos (previamente selecionados pela Embrapa Gado de Corte) em
delineamento em blocos ao acaso com tr?s repeti??es. Os acessos foram avaliados por meio de cortes a 25 cm do
n?vel do solo em parcelas de 4,0 m2, com espa?amento de 1 m entre linhas. A partir das an?lises dos resultados,
foi poss?vel notar que apenas as caracter?sticas taxa de alongamento de colmo, taxa de alongamento de folha e
comprimento final da lamina foram estatisticamente diferentes entre os acessos avaliados. Para taxa de
alongamento de colmo o coeficiente de varia??o do ambiente apresentou valor elevado. O coeficiente de
varia??o genot?pico da taxa de alongamento de colmo foi o maior entre as vari?veis avaliadas, indicando o
potencial de ganho na sele??o para o mesmo. Para o comprimento final da l?mina, foram observados coeficiente
da varia??o do ambiente e coeficiente da varia??o genot?pica inferiores ? taxa de alongamento do colmo,
contudo, foram obtidos herdabilidade e raz?o CVg/CVe semelhantes. Os coeficientes de varia??o residual e
genot?pico da taxa de alongamento foliar foram intermedi?rios em rela??o ?s demais caracter?sticas e assumiram
valores pr?ximos, que permitiram a estimativa de uma raz?o CVg/CVe pr?xima da unidade. O alongamento de
folhas apresenta maior potencial para ser inserido no processo de avalia??o e sele??o de forrageiras devido a sua
alta herdabilidade e raz?o entre os coeficientes de varia??o genot?pico e residual.The experiment was carried out to estimate the genetic parameters of morphogenetic characteristics in Panicum
maximum accessions. Were evaluated 17 accessions in a complete block design with three replicate. The
accessions were evaluated by cutting at 25 cm from de level soil in plots of 4 m?, with 1 m intercrop. It was
possible to note only the stems elongation rate, leaf elongation rate and leaf length were statistically different
between the accessions. To stems elongation rate we had high environmental coefficient of variation. In spite of
this the genotypic coefficient of variation was also the higher between the characteristics evaluated, indicating
potential to reduce this by selection. To leaf length, were observed genotypic and environmental coefficient of
variation lower than the stems elongation rate, however were observed similar heritability and
genotypic/environmental coefficient of variation rate. The genotypic and environmental coefficient of variation
of leaf elongation rate were intermediated between the other characteristics and had next values, so the
genotypic/environmental coefficient of variation rate was the higher in the experiment and next from one (0,93).
The leaf elongation rate has potential to be included in the process of evaluation and selection of forage plants
duly its high heritability and favorable environmental/genotypic coefficient of variation rate
