Abstract
Identification of genetic factors responsible for controlling germination traits under salinity will allow developing tolerant
cultivars. Here we have studied quantitative trait loci (QTL) linked to seed germination and early seedling growth traits using
recombinant inbred lines generated from crossing of wheat cultivars, Pasban 90 (salt tolerant) and Frontana (salt susceptible).
QTL analysis were done using composite interval mapping (CIM) for germination percentage (G%), germination index (GI),
seedling vigor index (SVI), shoot length (SL), root length (RL), fresh wight (FW) & dry weight (DW). In this QTLs analysis
total 44 QTLs were identified, 26 QTLs out of 44 were identified in 150 mM salt stressed and eighteen QTLs under control
environment. Eleven main quantitative trait loci (QTLs) were localized on 1B, 2B, 3B, 5B, 6B and 7B chromosome of mapping
population in stressed environment. QTLs mapped on 6A, 3B, 6B and 6D chromosome for root and shoot length, fresh and
dry weight were recognized as a major QTLs under control treatment. QTLs for root and shoot length were mapped on 2D
same position in xgdm36-xwmc111. Root length and dry weight QTLs was flanked in interval of xgwm70-xgwm325 markers
on 5B chromosomes. The result of this study revealed that QTLs play main role in salt tolerance at seed germination and early
seedling growth stage.
