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Direct effects of cyclic selection fo longer seminal roots in spring barley (Hordeum vulgare L.)

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Gorny A. G.

Journal of Applied Genetics

1995

vol. 36

issue 1

17-26

Cyclic pedigree selection for longer seminal roots was performed in the F2, F3 and F4 generations of hybrid population of spring barley.The total length of roots was measured in seedlings grown in filter-paper rollers.The intensity of selectio was 20% (C1, C2 cycles) and 26% (C3).Selection wasceffective.On anaverage, the finally selected F5-pedigrees formed 6% longer seminal roots system than the initial F2's and much of them exibited 7-16% improved rooting when compared with the best parent in a sand-vermiculite pot culture.Realized heritability coefficient of the root length ranged from 0.21 to 0.37 when assessed by the ratio of selection response to selection differential, while those estimated by the parent-offspring regressions attained 0.40-0.53.The obtained results suggest that progeny evaluation and/or seletion delayed for later generations should be essential for more effective root selection in barley.

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1 Journal of Applied Genetics

1 1995

1 Gorny A. G.

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Direct effects of cyclic selection fo longer seminal roots in spring barley (Hordeum vulgare L.)