The whole-genome dissection of root system architecture provides new insights for the genetic improvement of alfalfa (Medicago sativa L.).

ABSTRACT: Appropriate root system architecture (RSA) can improve alfalfa yield, yet its genetic basis remains largely unexplored. This study evaluated six RSA traits in 171 alfalfa genotypes grown under controlled greenhouse conditions. We also analyzed five yield-related traits in normal and drought stress environments and found a significant correlation (0.50) between root dry weight (RDW) and alfalfa dry weight under normal conditions (N_DW). A genome-wide association study (GWAS) was performed using 1 303 374 single-nucleotide polymorphisms (SNPs) to explore the relationships between RSA traits. Sixty significant SNPs (-log ₁₀ (P) ≥ 5) were identified, with genes within the 50 kb upstream and downstream ranges primarily enriched in GO terms related to root development, h

SUBMITTER: Jiang X 

PROVIDER: S-EPMC11725648 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature