COCOS - Journal of the Coconut Research Institute of Sri Lanka

Permanent URI for this collectionhttps://dl.nsf.gov.lk/handle/1/7343

Browse

Subject: search.filters.subject.Genetics

Search Results

Now showing 1 - 3 of 3
  • Thumbnail Image
    Item
    Variation in seedling characters of three different coconut cultivars and their use in identification in the nusery
    (CRI, 1991-93) Fernando, W.M.U.; Pieris, T.S.G.; Wickramaratne, M.R.T.
  • No Thumbnail Available
    Item
    Coconut breeding in Sri Lanka:a review
    (CRI, 1988) Liyanage, D.V.; Wickramaratne, M.R.T.; Jayasekara, C.
    Work done by Coconut Research Institute, Sri Lanka, on the genetics and breeding of the coconut palm from 1930 to 1980 is described.
  • Thumbnail Image
    Item
    Genetic control of husked nut weight in coconut (Cocos nucifera)
    (Coconut Research Institute. Lunuwila, 1996) Fernando, W.M.U.
    The genetic control of husked nut weight in coconut (Cocos nucifera) was investigated using a full-diallel cross including eight parents. The parents were selected sample of palms which gave an annual mean yield of 23 kg of copra per palm with 713 gm of husked nut weight over five years. An average of five progenies per cross planted in a fully randomised designed were evaluated for five years. Husked nut weight of five nuts per palm was recorded at each pick. Analysis of variance of mean husked nut weight confirmed the presence of additive and non additive genetic variance to the total phenotypic variance was 0.45. Of the dominance components, directional dominance was non significant. Neither the presence of heterosis nor inbreeding depression was consistent among the selfed and crossed progenies elucidating the fact that not only crossing but selfing could also improve the trait, depending on the genetic constitution of the individual. Reciprocal differences were evident in the crosses suggesting the importance of the direction of cross.