Lavender is a valuable aromatic and medicinal plant, but its improvement is limited due to scarcity of diverse and well characterized genetic material. Therefore, assessing the genetic diversity of available germplasm is essential for developing new stable and high-yielding varieties. The study evaluated genetic diversity among 61 genotypes through integrated analysis of morphological traits evaluated at Palampur and simple sequence repeats markers. Analysis of variance revealed significant variations for all the studied morphological traits and essential oil yield. A total of 303 alleles were identified across all loci (average 13.77/locus), the most frequent, rare and common alleles were 1.04, 0.90 and 11.81, respectively. High polymorphic information content (PIC) (0.65) and genetic diversity (0.67) values were observed. Analysis of molecular variance (AMOVA) revealed significant variation among groups (7 %), within groups (84 %), and within individuals (9 %). The studied genotypes were clustered into three groups for both morphological and molecular markers. STRUCTURE analysis also grouped the studies genotypes into three sub populations (K = 3). Principal component analysis revealed first three significant principal components that accounted for 72.78 % of the total variation. While, the first three principal coordinates based on SSRs accounted 20.69 % of the total genetic variance. The study suggests that integrated morpho-molecular approaches can effectively guide parental selection and trait mapping in future lavender breeding programs.
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