Inheritance pattern of seed and lint traits in cotton (Gossypium hirsutum)
2009
Ali, M.A. (Barani Agricultural Research Station, Fateh Jang (Pakistan)) | Awan, S.I. (Barani Agricultural Research Station, Fateh Jang (Pakistan))
A 5x5 diallel cross experiment was made to assess the inheritance pattern of some seed and lint traits in cotton using Mather and Jinks approach. Genotypic differences were significant (P less than or equal to 0.01) for all the characters. The data of all the parameters were partially adequate for genetic analysis except seed weight per boll and lint index. Additive component of variation (D) was significant and predominant for number of seeds per boll, GOT and lint index, while dominance effects (H1 and H2) were main controlling agents for seed weight per boll, seed index and lint yield and it was firmly supported by the value of H1/D0.5 for these parameters. Excess of dominant genes than recessive ones in the parents was revealed for seed weight per boll, seed index and lint ginning out turn (GOT). The values of h2 and H2/4H, demonstrated asymmetrical and un-equal distribution of dominant genes in parents for all the characters. Number of seeds per boll, GOT and lint index exhibited high narrow sense heritability (h2 n.s.) due to the presence of additive gene action, whereas seed weight per boll, seed index and lint yield possessed low heritability. The genetic analysis suggested that number of seeds per boll, GOT and lint index could be graded through full-or half-sib family, pedigree and progeny selection, while exploitation of hybrid vigour would probably be the way to achieve the genetic progress in seed weight per boll, seed index and lint yield.
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