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Document Type

Research

Keywords

Sorghum bicolor L. Moench, seed size, recurrent selection, genetic male-sterility, mass selection

Abstract

Performance of S1 and half-sib (HS) family composites from the random-mating sorghum (Sorghum bicolor L. Moench) population IAP3BR(M) was evaluated in six environments in Iowa. Composites from C0 through C4 for both family types showed that mass selection for heavy 100-seed weight was effective for increasing seed size in the population. Grain yield also increased over cycles among HS bulks, but decreased in the S1 bulks. Selection for large seed through four cycles resulted in fewer seeds/panicle in both family types, and in an increase in the means for days to midbloom and plane height. Inbreeding effects determined from half-sib and S1 family means were significant (P<0.05) only for grain yield, where a value of -29.6% was estimated. Inbreeding depression was estimated at - 14.0% for 100-seed weight, -10.2% for seeds/panicle, and -22. 7% for plant height, but none exceeded the 0.05 level of probability.

Publication Date

June 1986

Journal Title

Journal of the Iowa Academy of Science

Volume

93

Issue

2

First Page

37

Last Page

40

Copyright

© Copyright 1986 by the Iowa Academy of Science, Inc.

Language

EN

File Format

application/pdf

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