Selection index in coconut palm
1989
Louis, H. | Chopra, V.L. (Tamil Nadu Agricultural Univ., Tamil Nadu (India). Regional Research Station)
Discriminant function was adopted to formulate a selection index used in identifying two economic characters of coconut, namely, the number of nuts, and copra weight per nut against 17 common growth and reproductive characters. Three characters had common and positive role, and two had common but negative role, in the selection for either the number of nuts or copra weight per nut. The number of leaves and height of the juvenile palm was traced as additional requisites for identifying palm with increased number of nuts, while the thickness of kernel and shell served as additional characters for identifying palms with good copra weight. The expected genetic advances in selecting palms for the number of nuts and copra weight per nut through the selection index are 36.5% and 68.88%, respectively. Index score was highest for ecotypes from the Philippines (San Ramon) and South Africa (San Blas) in both selection.
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