Genetic variability, heritability, genetic advance and multivariate analysis studies in New Guinea Impatiens cultivar

Genetic diversity is essential for any plant breeding program to produce a superior cultivar. Genetic parameters, which include genetic variability, heritability, and correlation between characters, are essential factors in the selection process. The objective of this study was to evaluate the genetic diversity and investigate the association between the various quantitative parameters of the New Guinea cultivars of Impatiens. The experiment was carried out in Screen House Garden of BRIN in Palasari Cipanas West Java, Indonesia (1000 above sea level), from September 2022 to May 2023. Fifteen Impatiens accessions were evaluated in a Randomized Complete Block Design with three replicates. Fourteen morphological descriptors were measured to determine the variability and correlation coefficients. The analysis of variance showed a highly significant variation for all characters, which indicates greater variability in the accession. The analysis of variance revealed a highly significant variation for all characters, indicating increased variability in the accession. The genotypic coefficient of variance ranged from 0 (dorsal petal width) to 71.28 flower number per plant). The phenotipic coefficient of variance ranged from 10.01 (flower width) to 80.13 (flower number per plant). High heritability in broad sense estimates were obtained for the majority of the traits examined. High heritability in broad sense (0.61 - 1.00) estimates were obtained for all the traits examined. Leaf length, ventral petal length, and flower number showed high genetic advance. The range of correlation between characters was from -0.01 - 0.96. Genotype NGP01, NGP02, NGP03, and PLS33.3 are potential candidates for breeding programs.

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