We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Genetic diversity among Brazilian carioca common bean cultivars for nitrogen use efficiency.
- Authors
Zeffa, Douglas Mariani; Moda‐Cirino, Vânia; Delfini, Jéssica; Medeiros, Isabella Arruda; Koltun, Alessandra; Nogueira, Alison Fernando; Scapim, Carlos Alberto; Gepts, Paul; Gonçalves, Leandro Simões Azeredo
- Abstract
The objective of this study was to determine the genetic diversity among Brazilian carioca common bean (Phaseolus vulgaris L.) cultivars for traits related to nitrogen use efficiency (NUsE). An additional objective was to identify potential parents and promising parental combinations to assist common bean breeding programs in the development of cultivars with improved NUsE. The experiments were carried out at the Experimental Stations of the Instituto de Desenvolvimento Rural do Paraná (IDR–Paraná) in Londrina and Ponta Grossa, Brazil, during the rainy season in 2017. Thirty‐nine common bean cultivars were evaluated under high (40 kg N ha−1) and low N (0 kg N ha−1) applied as top‐dressing. The cultivars were genotyped using the genotyping‐by‐sequencing (GBS) approach with restriction enzyme CviAII. A total of 23,823 single nucleotide polymorphism (SNP) markers were identified throughout the common bean genome. A wide genetic variability was observed for NUsE‐related traits under high and low N conditions. In addition, correlations were found between shoot dry biomass and NUsE, N uptake efficiency (NUpE), and N utilization efficiency (NUtE) under low N, indicating the possibility of indirect selection of these traits by the plant shoot dry biomass. Interestingly, the most low‐N‐tolerant cultivars were not necessarily the most responsive and/or NUsE, suggesting that different morphophysiological mechanisms control these traits. The cultivars that stood out positively in this study can be used as parents in breeding programs aimed at developing cultivars that are adapted to N limitation. Core Ideas: Determine the genetic variability present in Brazilian carioca common bean cultivarsDevelopment of cultivars with improved N use efficiencyIdentify potential parents and promising parental combinations to assist common bean breeding
- Subjects
LONDRINA (Brazil); COMMON bean; GENETIC variation; CULTIVARS; SINGLE nucleotide polymorphisms; PLANT shoots
- Publication
Crop Science, 2021, Vol 61, Issue 4, p2534
- ISSN
0011-183X
- Publication type
Article
- DOI
10.1002/csc2.20444