Burias, N. and Planchon, C. (1990) Increasing soybean productivity through selection for nitrogen fixation. Agronomy Journal, 92 (6). pp. 1031-1034.
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Abstract
The soyabean cultivars Maple Arrow, Jiling 14 and Kingsoy were crossed with Weber and the 3 resulting F2 populations were grown in nutrient solution in phytotronic chambers under temperature and N nutrition conditions favourable for maximum [Bradyrhizobium] symbiosis. Acetylene reduction activity estimates were carried out at growth stage R5; plants with the best and worst values were selected to produce F4-derived lines. Seed yield of F4-derived lines was evaluated under normal population density on a Typic Udifluvent loamy-sand soil. Seed yield and N2 fixation were expressed with respect to the mean value of the genotypes with the same date of maturity. Seed yields of the F4 lines were correlated with the N2 fixation of the F2 parent plants. This correlation was observed for all plants investigated including all crosses and for each of the crosses Weber X Maple Arrow, Weber X Jiling 14 and Weber X Kingsoy. Seed yield of the F4 lines was also correlated with nodule volume and nodule dry weight particularly at each cross level. High nodulation ability and high N2 fixation rates appeared to increase soyabean seed yield. It is suggested that early breeding for these traits may result in a genetic gain in seed yield in the progeny
| Item Type: | Article |
|---|---|
| Author Affiliation: | Laboratoire d'Amélioration des Plantes, Institut National Polytechnique (ENSAT), 31076 Toulouse, France |
| Subjects: | Plant Production |
| Divisions: | Soyabean |
| Depositing User: | Syamala |
| Date Deposited: | 14 Apr 2011 08:54 |
| Last Modified: | 14 Apr 2011 08:54 |
| Official URL: | https://www.agronomy.org/publications/aj/abstracts... |
| URI: | http://eprints.icrisat.ac.in/id/eprint/1774 |
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