General combining ability and its repeatability in early generations of potato breeding programmes |
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| Authors: | J Gopal |
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| Institution: | (1) Division of Genetics and Plant Breeding, Central Potato Research Institute, 171 001 Shimla, Himachal Pradesh, India |
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| Abstract: | Summary General combining ability and its repeatability in the early generations of a potato breeding programme was studied by evaluating
72 progenies (18×4) of 22 parents in a factorial mating design for three successive generations. The mean squares for combining
ability due to females, males and females × males were significant for eight out of the ten characters studied. Variance estimates
due to specific combining ability were more important than those due to general combining ability for most of the characters
in all the generations. General combining ability effects varied from generation to generation. Most of the correlation coefficients
between generations for general combining ability effects were significant, but of moderate magnitude (0.5–0.8). Parents with
consistent performance over generations and those specifically suitable for a TPS crop were identified. |
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| Keywords: | Solanum tuberosum L general combining ability seedling generation clonal generations genotypexenvironment yield tuber colour and shape |
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