Emery, D.A. and Wynne, J.C. (1976) Systematic selection for increased fruit yield in populations derived from hybridization only, F1 irradiation, and hybridization following parental irradiation in peanuts (Arachis hypogaea L.). Environmental and Experimental Botany , 16 (1). pp. 1-8.
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Abstract
Three hybrid peanut populations involving a single pair of high yielding parents were developed to determine the effects of irradiation prior to and after hybridization on the response to selection for fruit yield. The control-hybrid population was produced by making reciprocal crosses between the two parents. The pre-hybrid-irradiated population was initiated by making reciprocal crosses between the M1 plants of the two parents irradiated as seeds. The post-hybrid-irradiated population was developed by irradiating the mature F1 embryos of crosses between the same parents. Each of the three original populations consisted of 55 F1 plants. Ten F2 plants were grown from each F1 and one F3 plant from each F2 was used to initiate the yield tests. Selection for increased yield was practiced systematically and uniformly in each population over the F3–F5 generations until the number of lines derived from single F1 plants was reduced to five and the number of sublines descended from particular F2 plants to three per line for yield trials in the F6 generation. The mean yields of the F1 derived lines of the irradiated populations were considerably below that of the control hybrid population when selection began but they reached 99% of the control mean in the F6 generation. Selection gains in the irradiated populations appeared to result from the removal of inferior yielding sublines since greatest progress was made by raising the lower extremities of mean F2 derived subline ranges rather than by extending the upper extremities of the ranges. The three highest yielding lines in the F6 generation occurred in the irradiated populations while the three highest yielding sublines were found in the hybrid-control population. No incidental association between size and yield of fruit was noted and a wide range of fruit sizes was found among the high yielding lines and sublines in all populations.
| Item Type: | Article |
|---|---|
| Additional Information: | SNNigam collections |
| Author Affiliation: | Dep. Crop Sci., NC State Univ., Raleigh, USA. |
| Subjects: | Statistics and Experimentation Crop Improvement |
| Divisions: | Groundnut |
| Depositing User: | Mr T L Gautham |
| Date Deposited: | 27 Jul 2013 11:35 |
| Last Modified: | 27 Jul 2013 11:35 |
| Official URL: | http://dx.doi.org/10.1016/0098-8472(76)90027-7 |
| URI: | http://eprints.icrisat.ac.in/id/eprint/11245 |
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