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O gênero Brachiaria é constituído por cerca de cem espécies, sendo de grande interesse para o melhoramento genético das espécies forrageiras a correta classificação dos acessos envolvidos nos programas de hibridação. Foram analisados 301 acessos, pertencentes a seis diferentes espécies de braquiária, nos quais foram avaliadas características vegetativas, reprodutivas e de pilosidade. Foram realizadas análises discriminantes de Anderson para cada um dos três grupos de caracteres morfológicos, sendo estabelecidas funções para as seis espécies. As taxas de classificação correta para os caracteres vegetativos, reprodutivos e de pilosidade foram, respectivamente, as seguintes: B. brizantha (74,00; 69,33 e 30,67%), B. decumbens (63,04; 89,13 e 65,22%), B. humidicola (52,78; 69,44 e 52,78%), B. jubata (83,87; 77,42 e 64,52%), B. ruziziensis (89,29; 92,86 e 85,71%) e B. dictyoneura (80,00; 70,00 e 70,00%). Os caracteres vegetativos e reprodutivos mostraram ser os mais eficientes, enquanto os de pilosidade foram os menos eficientes na classificação e discriminação das espécies. The genus Brachiaria encompasses about one hundred species and the correct classification of the accessions involved in the breeding programs is of great interest for the genetic improvement of this forage species. Three hundred and one accessions of six different Brachiaria species were analyzed, in which vegetative, reproductive and pubescence characteristics were evaluated. Anderson's discriminant analyses were conducted for each one of the three groups of morphological traits and discriminant functions were established for the six species. Rates of correct classification for the vegetative, reproductive and pubescence characteristics were, respectively: B. brizantha (74.00%, 69.33% and 30.67%), B. decumbens (63.04%, 89.13% and 65.22%), B. humidicola (52.78%, 69.44% and 52.78%), B. jubata (83.87%, 77.42% and 64.52%), B. ruziziensis (89.29%, 92.86% and 85.71%) e B. dictyoneura (80.00%, 70.00% and 70.00%). The vegetative and reproductive traits showed to be the most efficient, while the pubescence group was the least efficient in the classification and discrimination of the species

Discriminação de espécies de Brachiaria baseada em diferentes grupos de caracteres Morfológicos