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Crop Science Abstract -

Haploid Breeding Technique for Flax1


This article in CS

  1. Vol. 17 No. 5, p. 757-760
    Received: Feb 5, 1977

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  1. T. E. Thompson2



A haploid breeding technique for flax (Linum usitatissimum L.) using a twin seedling character is described. The haploid twin can be distinguished from the diploid twin by seedling size 3 days after germination, plant height at any growth stage, and by the production of sterile flowers. The twinning frequency of 54 random entries from the USDA World Flax Collection was 1 set to 5,869 normal seed; a workable level in a flax cultivar development program. Use of a flax rust [Melampsora lint (Ehrenb.) Lev.] resistance marker gene showed the haploid twin to be of maternal origin, presumably produced by apogamety. In a breeding program this indicates haploid selection and doubling could be conducted in the F2 to allow for genetic recombination. A 16-month breeding program to produce completely homozygous breeding lines ready for field evaluation is described. This developmental period includes screening for rust resistance and selection for oil content and quality.

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