Abstract— The following study was conducted to estimate the genotypic differences among 30 wheat (Triticum aestivum L.) genotypes under different moisture regimes and relationship between morphological and molecular characterization. Eight seedling parameters root length (RL), shoot length (SL), root fresh weight (RFW), shoot fresh weight (SFW), root dry weight (RDW), shoot dry weight (SDW), chlorophyll rate (CR) and survival rate (SR) were studied at four different soil moisture conditions ( T140%,T260%,T380%,T4100%) using two factor factorial complete randomized design (CRD). Significant differences among genotypes were observed by analysis of variance. For heritability estimates, survival rate showed lowest heritability under all the treatments. Principal components analysis accounted 81.4% variation in T1, 81.9% in T2, 87.7% in T3 and 84.7% in T4 conditions in first PC. Selected diverse genotypes were further fingerprinted with 10 ISSR markers. A total of 74 DNA fragments were detected and 72.7% of was polymorphic. The amplified DNA fragments were ranged from 4 (UBC-809) to 11 (UBC-808). PIC values were ranged from 0.32 to 0.81. Cluster analysis grouped the genotypes into 4 clusters on the basis of molecular and phenotypic characterization under T4 normal conditions whereas under T1 (moisture stress) conditions genotypes were grouped into 5 clusters explaining genotypic differences under different moisture conditions. The present results showed that phenotypic difference in wheat seedling expression under different water regimes is accompanied with molecular basis, which offer a prospective to enhance wheat adaptation under moisture stress conditions.
Keywords— Principal component, Dendogram, Genotypes, Polymorphism.
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