Testcross performance of maize lines from backcross populations containing highland Mexican or highland Peruvian germplasm

Backcross populations of maize (Zea mays L.) were produced by crossing the early maturing inbred line W153R with the highland Mexican race Conico then backcrossing to W153R (Q1 population) and by crossing W153R with the highland Peruvian race San Geronimo then backcrossing to W153R (Q3 population)....

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Bibliographic Details
Published in:Euphytica 1989-05, Vol.41 (3), p.263-272
Main Authors: Eagles, H.A. (Plant Physiology Div. DSIR, Palmerston North (New Zealand)), Hardacre, A.K, Bansal, R.K
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
CROISEMENT
cross-breeding
CROSSBREEDING
CRUZAMIENTO
Fundamental and applied biological sciences. Psychology
Generalities
Generalities. Genetics. Plant material
Genetics and breeding of economic plants
germplasm
grain
HIBRIDOS
HYBRIDE
HYBRIDS
MEXICO
MEXIQUE
PEROU
PERU
plant breeding
Plant material
ZEA MAYS
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Summary:Backcross populations of maize (Zea mays L.) were produced by crossing the early maturing inbred line W153R with the highland Mexican race Conico then backcrossing to W153R (Q1 population) and by crossing W153R with the highland Peruvian race San Geronimo then backcrossing to W153R (Q3 population). The populations were recombined by one generation of random mating. Testcrosses were produced from S sub(0) plants in the original and recombined versions and these were evaluated in New Zealand for grain yield, grain moisture and other traits. Unexpected changes occurred during recombination for increased grain yield in the Q1 population and for decreased grain moisture in the Q3 population. This indicates strong, unplanned selection. Many testcrosses were higher yielding than check hybrids of W153R, but most were later maturing.
ISSN:0014-2336
1573-5060
DOI:10.1007/BF00021593