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A comparison of inbred lines derived by doubled haploidy and single seed descent in spring barley ( Hordeum vulgare )
Author(s) -
CALIGARI P. D. S.,
POWELL W.,
JINKS J. L.
Publication year - 1987
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1987.tb02024.x
Subject(s) - biology , hordeum vulgare , inbred strain , doubled haploidy , population , agronomy , linkage disequilibrium , poaceae , botany , genetics , gene , quantitative trait locus , allele , haplotype , demography , sociology
SUMMARY Samples of F x inbred lines, derived by doubled haploidy (DH) and single seed descent (SSD) from five spring barley crosses were compared for agronomic characters. It was shown that, over this range of diverse crosses, inbreds derived by either technique could surpass the better parent or even the heterotic F 1 . The means of the DH and SSD were, however, different for a number of characters, as well as differing from the mid‐parent value. It was concluded that these differences stemmed from the presence of interacting genes showing linkage disequilibrium, although there was no unambiguous test to distinguish this from differential survival during the production of inbreds. This view was further supported by the finding that the DH sample, which tends to preserve existing linkages, produced a higher proportion of lines exceeding the better scoring parent when compared with the SSD population.