15N evaluated in elite breeding lines
A total of 100 bean genotypes including 67 ENF lines, 13 CGA lines, MAC lines, MBC lines and 5 checks were evaluated for SNF ability and seed yield. Field trials were conducted at two locations (Darien and Popayan) in Colombia. Measurements included visual evaluation of root nodulation, 15N natural abundance (δ15N) in shoot tissue and seed, %N derived from the atmosphere (%Ndfa), total Ndfa (TNdfa), canopy biomass, total N uptake, N use efficiency (kg of seed produced per kg of N uptake in shoot biomass), N partitioning index (% of total N partitioned to seed) and pod harvest index (% of seed weight to pod weight).
- CIAT