| Autor: |
Acosta, Alvaro E., Crane, Paul L. |
| Zdroj: |
Crop Science; March 1972, Vol. 12 Issue: 2 p165-167, 3p |
| Abstrakt: |
The effectiveness of selection for lower ear height and the associated responses of four agronomic traits were evaluated. In a previous study two populations of maize (Zea maysL.), ‘Antigua 2D’ ✕ (BIO ✕ B14) and ‘ETO’ ✕ ‘CBC,’ were selected for lower ear height at a selection intensity of 50%. In this study they were submitted to two further cycles at 20% selection intensity. Evaluation was then made by means of topcrosses and populations per se. Ear height was reduced about 24% in both selected subpopulations during the four cycles, compared with the control subpopulations. Ear height of the control subpopulation in the ETO ✕ CBC population decreased about 3% per cycle compared with the original population. Plant height was reduced to a lesser degree. Lodging decreased in the selected subpopulation of Antigua 2D ✕ (BIO ✕ B14) population but not in the ETO ✕ CBC population. The selected subpopulations yielded progressively less than the control in each additional cycle of selection. |
| Databáze: |
Supplemental Index |
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