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Diallel analysis of yield and other traits in cotton

Luiz Paulo de Carvalho^I; Cosme Damião Cruz^II; Carlos Floriano de Moraes^III

^IEMBRAPA-CNPA, Rua Osvaldo Cruz 1143, Caixa Postal 174, 58107-720 Campina Grande, PB, Brasil. Send correspondence to L.P.C.
^IIDepartamento de Biologia, Universidade Federal de Viçosa, 36570-000 Viçosa, MG, Brasil
^IIIDepartamento de Fitotecnia, Universidade Federal de Viçosa, 36570-000 Viçosa, MG, Brasil

ABSTRACT

Six cotton cultivars (Gossypium hirsutum L. var. latifolium Hutch) and their hybrid combinations were analyzed in a complete diallel. Yield, boll weight and earliness showed greater dominance than additive variance components, although both were significant. The additive component was more important for number of bolls per plant, plant height and fiber maturity. Yield showed low heritability (estimated to be 0.19), controlled predominantly by dominant genes. The cultivar with the greater concentration of favorable alleles for this trait is CNPA 3H.

Keywords: diallel analysis; cotton.

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