Identification of quantitative trait loci for Na+, K+ and Ca++ accumulation traits in rice grown under saline conditions using F2 mapping population

摘要: Salinity affects rice production worldwide. Quantitative trait loci (QTL) for different sodium (Na+), potassium (K+), and calcium (Ca++) accumulation traits were detected using 113 F2 individuals derived from a cross between IR36 (salt-susceptible) Pokkali (salt-tolerant) cultivars. 17 QTLs detected; three under control conditions, saline 11 relative value datasets. These located on chromosomes 1, 3, 4, 5, 6, 7, 8 11, respectively. The R 2 (phenotypic variance explained) these ranged 7.69 to 72.57 %. identified 7 novel as there no previous reports of Na+ uptake (SU) K+ (PU) genomic regions. PU ratio (PUR) had significant positive correlation with grain yield conditions. PUR (QTLpur-3, QTLpurr-5-1, QTLpurr-5-2) will be helpful increasing salt stress A major locus controlling (QTLsur-7) was chromosome This may gene involved in SU. Additive effect the salt-tolerant cultivar, alleles increased this by 0.16 %. QTL is important respect exclusion good candidate marker-assisted selection.