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Fertility and aneuploidy in autopolyploidAnthoxanthum

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Abstract

An autopolyploid series comprising 2x, 3x and 4x was obtained by colchicining the diploid speciesA. ovatum Lag. The autotriploid, used as seed and pollen parent, was back-crossed to diploid and tetraploid. No significant overall difference was observed in fertility, but there was a tendency for particular pair crosses to the diploid as female parent to show higher levels of seed-setting. This may be associated with the relatively large proportion of haploid pollen that functions when the triploid is used as the male parent.

The effectiveness, in part, of the freely liberated pollen of autotriploidAnthoxanthum in producing progeny, contrasts with the total failure of manually liberated allotriploidDactylis pollen. Triploid sterility may well relate to degree of hybridity.

Genetic unbalance induced by aneuploidy was considered to be more relevant than the “genetic ratio” in seeds, as an explanation of the type of interploid progeny obtained inAnthoxanthum.

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Authors and Affiliations

  1. Welsh Plant Breeding Station, Aberystwyth, Wales

    M. Borrill & C. P. Carroll

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  1. M. Borrill
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  2. C. P. Carroll
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Cytological material in this paper was submitted by the junior author in partial satisfaction of the requirements for the degree of M.Sc. in the University of Wales.

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Borrill, M., Carroll, C.P. Fertility and aneuploidy in autopolyploidAnthoxanthum . Genetica 36, 420–438 (1965). https://doi.org/10.1007/BF01557174

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  • DOI: https://doi.org/10.1007/BF01557174

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