nitrogen-use-efficiency
Nitrogen-use efficiency (NUE) refers to a plant's ability to acquire, assimilate, and utilize nitrogen from the soil to maximize growth and yield relative to the nitrogen available. Since nitrogen is often a limiting nutrient in agricultural and natural ecosystems, improving NUE is a central goal in plant biology — reducing dependence on synthetic fertilizers while maintaining or increasing productivity. Research in this area explores the molecular pathways of nitrate and ammonium uptake, assimilation into amino acids, and the genetic factors that govern how efficiently plants convert inorganic nitrogen into biomass.
open_in_new WikipediaPubMed · 2026-05-05
Scientists identified the genetic regions controlling biomass production and nitrogen efficiency in tepary bean, a drought- and heat-tolerant legume. These findings provide breeders with specific genetic targets to develop tougher, more sustainable cover crop varieties for hot, dry climates.
49,384 DNA markers (SNPs) were identified across 206 tepary bean accessions, revealing largely separate polygenic genetic control for each trait studied.
Biomass-linked genes on chromosomes 6, 7, and 11 include candidates involved in structural growth and carotenoid metabolism, while nitrogen-use efficiency loci implicate trehalose-6-phosphate signaling and carbon-nitrogen coordination.
A single major genetic region on chromosome 3 controls flowering time, offering a clear breeding target for adapting tepary bean's growing season to different climates.
