ISSN:
1432-2145
Keywords:
Key words Actinidia
;
Dioecism
;
Sex determination
;
Sex markers
;
Sex ratios
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract First results from two strategies aimed at elucidating the genetics of sex in the dioecious genus Actinidia Lindl. (Actinidiaceae) support the hypothesis that sex-determining genes are localized in a pair of chromosomes which, although cytologically indistinguishable, function like an XX/XY system with male heterogamety. A. chinensis Planch., a close relative of the kiwifruit [A. deliciosa (A. Chev.) CF Liang et AR Ferguson], has diploid and tetraploid races. Bulk segregant analysis to find sex-linked markers revealed two markers whose inheritance patterns in three diploid families showed X and Y linkage and indicated that the male is the heterogametic sex. Some recombination between the markers and the sex-determining loci was also demonstrated. Sex ratios in 12 progenies from controlled crosses varied around 1:1, as expected for an XX/XY system.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s004970050082
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