ISHS Acta Horticulturae 444: III International Symposium on Kiwifruit
SEX DETERMINATION IN ACTINIDIA |
| Authors: | C. F. Harvey, Lena G. Fraser, G. P. Gill |
| Keywords: | kiwifruit, sex-markers, dioecy, RAPDs |
| Abstract:
In the genus Actinidia, sex-linked RAPD markers were sought by bulk segregant analysis in a sibling family of diploid Actinidia chinensis. Two sex-linked markers were found among 500 random primers tested. Both markers were inherted from the male parent of the cross, but one showed an 'X' linked type of inheritage pattern, while the other showed a ‘Y’ linked type of inheritance pattern. This data supports the theory of a primary sex-determining locus situated on a 'XY' pair of chromosomes, with the male as the heterogametic sex. The presence of a few recombinant plants in the family is evidence for recombination events between the 'X' and 'Y' chromosomes. | |
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