Assessment of genetic variability for growth, floral, yield and its component traits in coconut (Cocos nucifera L.)
Abstract
Genetic variability, heritability and genetic advance analysis of growth, floral, yield and yield attributing traits were studied in four dwarf x tall coconut hybrids, one tall x dwarf hybrid along with two tall varieties as checks. The palms were raised in four replications in randomised block design with six palms per replication. The age of the palm was nine years. Observations on morphological features were recorded in all the palms and the datas were subjected to statistical analysis. It revealed high to moderate degree of variability among the genotypes for most of the traits studied. The genetic variability studies indicated that the number of nuts per palm, whole nut weight, de-husked nut weight and tender nut water content evidenced high degree for phenotypic coefficient of variation and genotypic coefficient of variation. Superior level of heritability was recorded for palm height, leaflet breadth, the number of leaves, nut yield, fruit length, fruit breadth, tender nut water content, whole nut weight, de-husked nut weight and copra outturn thus indicating the prominence of genetic influence in inheritance of these traits. Genetic advance expressed on per cent mean was high in palm height, nut yield, tender nut water content, whole nut weight, de-husked nut weight and copra outturn. Therefore, the above traits could be given due weightage in coconut breeding programmes.
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