Heterosis for symbiotic nitrogen fixation in Phaseolus interspecific hybrids |
| |
Authors: | Monika M. Lülsdorf F. Brian Holl |
| |
Affiliation: | (1) Department of Plant Science, The University of British Columbia, 248-2357 Main Mall, V6T 1Z4 Vancouver, BC, Canada;(2) Present address: NRC Plant Biotechnology Institute, 110 Gymnasium Road, S7N 0W9 Saskatoon, SK, Canada |
| |
Abstract: | Summary Interspecific hybrids of Phaseolus vulgaris and Phaseolus acutifolius or Phaseolus filiformis have been evaluated for evidence of heterosis for symbiotic nitrogen fixation activity. Hybrids showing composite leghemoglobin profiles were selected for comparison. Rooted cuttings from hybrids and their respective parents were used to estimate nitrogen fixation (acetylene reduction) rates and to determine nitrogen accumulation during the growth period. Some hybrids of Phasolus vulgaris × Phaseolus acutifolius and Phaseolus vulgaris × Phaseolus filiformis had significantly (P<0.01) higher nitrogen fixation rates and in the latter case, accumulated more total nitrogen, than either parent. The interspecific hybrids also showed more complex leghemoglobin profiles than either parent. |
| |
Keywords: | Phaseolus vulgaris Phaseolus acutifolius Phaseolus filiformis nitrogen fixation leghemoglobin interspecific hybrid heterosis |
本文献已被 SpringerLink 等数据库收录! |
|