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Haploid Breeding Technique for Flax 1
Author(s) -
Thompson T. E.
Publication year - 1977
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1977.0011183x001700050020x
Subject(s) - biology , ploidy , lint , linum , seedling , doubled haploidy , selection (genetic algorithm) , cultivar , breeding program , rust (programming language) , botany , horticulture , agronomy , genetics , gene , artificial intelligence , computer science , programming language
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 F 2 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.