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Home > Iowa Academy of Science > Journals & Newsletters > Journal of the Iowa Academy of Science > Volume 96 (1989) > Number 2

 

Document Type

Research

Keywords

Sorghum bicolor L. Moench, recurrent selection, agronomic traits, random-mating population quantitative inheritance, breeding methods

Abstract

Experiments were conducted co obtain information on the effects of two methods of developing parental lines from a random-mating population of sorghum (Sorghum bicolor L. Moench) on hybrid performance. Gridded mass selection for threshed panicle weight was used in developing IAP1R(M)C3: and a sister population, IAP4R(S1)C3, was advanced each cycle on the basis of grain yield of S1 families in replicated yield trials. Hybrids with male parents developed by mass selection did not differ significantly for grain yield and panicles/plant from those with parents chosen on the basis of S1 yield tests. The S1-selection hybrids were significantly (P ≤0.01 or P ≤0.05) shorter and later to bloom, had smaller seed and more seeds/panicle, but the differences usually were small and of little practical consequence. Estimates of generic variance, heritability, and expected gain from selection among hybrids developed with mass or S1 selected male parents were similar for grain yield and most other characters. Collectively, the results of our experiments indicated that developing sorghum parental lines by using mass selection for panicle weight or replicated S1 yield tests should be equally effective.

Publication Date

June 1989

Journal Title

Journal of the Iowa Academy of Science

Volume

96

Issue

2

First Page

57

Last Page

60

Copyright

© Copyright 1989 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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