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Sex determination in Actinidia. 1. Sex-linked markers and progeny sex ratio in diploid A. chinensis

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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.

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Authors and Affiliations

  1. The Horticulture and Food Research Institute of New Zealand Ltd., Mt. Albert Research Centre, Private Bag 92169, Auckland, New Zealand Fax +64 9 815 4201; e-mail mmcneilage@hort.cri.nz, , , , , , NZ

    C. F. Harvey, G. P. Gill, L. G. Fraser & M. A. McNeilage

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  1. C. F. Harvey
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  2. G. P. Gill
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  3. L. G. Fraser
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  4. M. A. McNeilage
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Received: 20 December 1995 / Revision accepted: 24 April 1997

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Harvey, C., Gill, G., Fraser, L. et al. Sex determination in Actinidia. 1. Sex-linked markers and progeny sex ratio in diploid A. chinensis . Sex Plant Reprod 10, 149–154 (1997). https://doi.org/10.1007/s004970050082

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  • DOI: https://doi.org/10.1007/s004970050082

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