Campus Units
Agronomy
Document Type
Article
Publication Version
Published Version
Publication Date
1987
Journal or Book Title
Maydica
Volume
32
Issue
1
First Page
61
Last Page
78
Abstract
Estimates of heritability allow breeders to calculate expected progress from selection relative to germplasm sources, the type of breeding procedure used to improve the germplasm, and the amount of testing of genetic material. The objective of this study was to compare estimates of heritability and other genetic parameters for yield of maize (Zea mays L.) by using variances among progenies for 121 selection experiments from seven recurrent selection programs. The seven recurrent selection methods included full-sib (FS), half-sib (HS), S 1 per se progeny (S 1 ), S2 per se progeny (S2), testcrosses with an inbred tester (TCI), testcrosses with an broad-base tester (TC-B), and full-sib reciprocal recurrent selection (FR). The estimates of the heritabilities from the pooled analyses were 68.00/o (FS), 58.50/o (HS), 79.80/o (Sl), 77.30/o (S2), 53.30/o (TC-I), 62.70/o (TC-B), and 54.90/o (FR). The estimate of heritability was unexpectedly smaller for S2 when compared with S1 selection. The hypothesis was developed that the small relative value of heritability for S2 selection was due to the importance of dominance effects in the individual populations undergoing selection. The effects of machine versus hand harvesting were to increase the error variance 2.5 times and the genetic variance 2 times. Heritabilities were similar for hand and machine harvesting.
Rights
Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.
Language
en
File Format
application/pdf
Recommended Citation
Lamkey, K. R. and Hallauer, A. R., "Heritability estimated from recurrent selection experiments in maize" (1987). Agronomy Publications. 208.
https://lib.dr.iastate.edu/agron_pubs/208
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Breeding and Genetics Commons
Comments
This article is published as Lamkey, K. R., and A. R. Hallauer. 1987. Heritability estimated from recurrent selection experiments in maize. Maydica 32:61-78.