Combining ability and parental effects in 4x–2x crosses for potato breeding |
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Authors: | R Ortiz M Iwanaga H A Mendoza |
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Institution: | (1) International Potato Center (CIP), P.O. Box 5969, Lima, Peru |
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Abstract: | Summary Nine 2x clones with different genetic backgrounds and 2n pollen production by first division restitution (FDR) were each mated
with five 4x females in a linextester design. Estimates of both general combining ability (GCA) and specific combining ability
(SCA) were significant for tuber yield, among female and male parents. Four FDR clones with similar genetic background (half-sibs)
showed significantly different GCA for total yield, illustrating the importance of progeny testing for FDR clones before their
utilization as progenitors. A stronger influence of the 2x parents, compared to that of the 4x parents, on the performance
of the hybrids was observed for characters studied. The significance of male and female interactions for characters other
than tuber yield reinforced the importance of careful choice of the male and female parents for improving horticultural traits
of 4x–2x progenies. |
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Keywords: | GCA SCA FDR 2n pollen progeny test |
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