Assessment of Genotypic and Phenotypic Correlation Coefficient in Twenty Genotypes of Gladiolus (Gladiolus grandiflorus L.) for Gwalior Region

Abstract

A field experiment was conducted to study the “Genotypic and Phenotypic correlation coefficient in twenty genotypes of Gladiolus for Gwalior region” during 2021-2022 at Department of Genetics and Plant Breeding, School of Agriculture, ITM University, Gwalior, Madhya Pradesh. In this experiment twenty genotypes of Gladiolus were planted for the evaluation and the results of investigation revealed that for yield improvement through selection emphasis should be given on the characters like Plant height, Spike length, Rachis length, No. of shoots per plant, No. of corms per plant. Especially the emphasis may be laid down upon the Plant height, Number of florets or Diameter of the floret, since these characters had highly significant and positive correlations with Spike length so a direct selection from genotypes will be more effective for improvement of this crop.

Study on the Evaluation Genetic Variability of Gladiolus (Gladiolus grandiflorus) Cultivars Under Agro –Climatic Conditions of Prayagraj

“…The magnitude of variability present in a crop species are importance for the effective selection. The phenotypic variation in the population is due to a genotypic and environmental effect [19][20][21][22][23][24][25] Phenotypic variation is observable variation in population which includes both genotypic and environmental components which results that its magnitude differs due to environmental conditions whereas genotypic variation is the component of variation which is due to gene difference among the different individuals in a population [29][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. Fisher (1918) divides genetic variance into three components as additive variance, dominance variance and epistatic variation.…”