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vol.33 número6  suppl.3Determinação da digestibilidade da matéria seca e da proteína bruta do fubá de milho e do farelo de soja para tambaqui (Colossoma macropomum), utilizando-se técnicas com uso de indicadores internos e externosCaracterização de onze linhagens puras de guandu selecionadas em São Carlos, SP índice de autoresíndice de assuntospesquisa de artigos
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Revista Brasileira de Zootecnia

versão impressa ISSN 1516-3598

Resumo

GODOY, Rodolfo  e  SOUZA, Francisco Humberto Dübbern de. Dormancy on pigeon pea seeds (Cajanus cajan (L.) Millsp). R. Bras. Zootec. [online]. 2004, vol.33, n.6, suppl.3, pp.2201-2205. ISSN 1516-3598.  http://dx.doi.org/10.1590/S1516-35982004000900004.

An experiment was conducted to study seed dormancy (hardseedness) in seventeen genetic lines and three commercial cultivars of pigeon pea. The seeds were hand-harvested, hand-shelled, and stored in paper bags in a chamber with 10°C and 25% air relative humidity. Four replications of fifty-seed samples were put to germinate in moist paper rolls at 30ºC, after one, two, three, four, five, nine, twelve and fifteen months of storage. No hard seeds were observed among eight lines and the three commercial cultivars. Among these lines, g58-95 had low storage potential, quickly losing germination percentage. Line g184-97 presented low percentage of hard seeds, lines g3-94, g6-95 and g124-95 kept the initial percentage, g101-97, g127-97, g154-95 and g167-97 had the percentage of hard seeds increased from one to nine months of storage, and percentage of hard seeds of line g27-94, constantly decreased. It was concluded that pigeon pea genotypes vary amply among themselves in terms of hard seed production potential and that satisfactory germination of its seed lots may require artificial chemical or mechanical scarification.

Palavras-chave : storage; hard seeds; forage crop; Fabaceae.

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