Identification of QTLs associated with agronomic performance under nitrogen-deficient conditions using chromosome segment substitution lines of a wild rice relative, Oryza rufipogon

摘要: Improved root system architecture can enhance agronomic performance by increasing water and nitrogen (N) acquisition efficiency. However, little is known about interaction between under field environments. To gain a better understanding the genetic basis of these relationships, we evaluated set chromosome segment substitution lines (CSSLs) derived from crosses tropical japonica rice cultivar ‘Curinga’ wild species Oryza rufipogon accession IRGC105491. Root architectural traits were investigated using CSSLs at 40 days old seedlings basket method hydroponic conditions, performances also tested conditions with different N treatments. Agronomic computed as ratio trait value low to high treatments, including grain yield biomass nitrogen-deficiency tolerance (NDT) traits. NDT QTLs mapped 238 SNP marker loci. A total 13 for architectural, morpho-physiological identified on chromosomes 1, 3, 4, 5, 7, 8, 9, 10 12. Interestingly, QTL deeper number was region markers id1012330 id1021697 1 overlapped relative (qRGY1). These results suggest that helpful maintain nitrogen-deficient conditions. The associated could potentially be used in future rice-breeding efforts increase