Genetic Variability, Correlation, and Path Analysis of Thai Commercial Melon Varieties

Thanet Khomphet,Athakorn Promwee,Warin Intana,Shams Shaila Islam,Maria Serrano

doi:10.1155/2022/7877239

Abstract

In the selection phase of melon breeding programs, genetic variability is a critical component for yield improvement. The goals of this study were to discover the variables that affect melon fruit weight and examine genetic variability, correlation, and path analysis of eight melon varieties. The experiment was arranged as a completely randomized block design with 4 blocks. It was conducted between July and September 2021 at the School of Agricultural Technology, Walailak University, Nakhon Si Thammarat, Thailand. The result found that stem diameter and length, leaf length, width, number, and chlorophyll, day to 50% male and female flowering, and fruit perimeter, height, and weight were highly significant across the varieties. The genotypic coefficients of variation (GCV) of observed variables were all lower than phenotypic coefficients of variation (PCV). Fruit weight (15.462 and 19.865%) had the highest GCV and PCV. High broad-sense heritability was linked to high (H) or moderate (M) genetic advance as a percentage of the mean from stem length (67.606%: H and 21.992%: H), fruit weight (60.586%: H and 24.793%: H), fruit perimeter (76.395%: H and 12.258%: M), and fruit height (69.828%: H and 12.122%: M). The maximum and significant genotypic correlation value was obtained between leaf length and leaf width (r = 1.000). Fruit weight is positively correlated with fruit perimeter (r = 0.940) and fruit height (r = 0.831). According to correlation and path analyses, stem diameter and length, leaf chlorophyll, and fruit perimeter and height were considered variables for fruit weight improvement in the breeding programs. It suggests that the increase in traits with a favorable direct influence on fruit weight may directly contribute to fruit weight.

Highlights

Melon, called muskmelon (Cucumis melo L.), is one of the world’s most important commercial fruit crops [1]
All observed attributes were statistically significant (p < 0.01). e maximum coefficient of variation (CV) of observed variables was obtained in stem length (8.99), followed by stem diameter (8.76%), leaf chlorophyll (7.70%), and day to 50% female flowering (7.33%). e lowest CV was found in fruit perimeter (3.78)
Fruit weight (15.462 and 19.865%) had the highest genotypic coefficients of variation (GCV) and phenotypic coefficients of variation (PCV), followed by stem length (12.984 and 15.791%), and day to 50% female flowering (3.004 and 7.380%) had the lowest of both GCV and PCV. e findings of this study’s GCV and PCV are similar to those of Kumbar et al [5], who investigated the genetic variability and correlation of the Mangalore melon traits. In every attribute they looked at, the GCVs were lower than the PCVs. e high GCV and PCV were obtained from average fruit weight, fruit width, fruit yield per plant, flesh thickness, vine length, seed cavity length, and the number of branches

Summary

Introduction

Called muskmelon (Cucumis melo L.), is one of the world’s most important commercial fruit crops [1]. It is well known for its flavor, taste, and phytonutrient content [2]. Melon fruit is high in phytonutrients, including potassium, vitamin C, and provitamin A, known as betacarotene [3]. Melon is regarded as one of the most expensive fruits in ailand due to its difficulty in production. For excellent fruit quality and quantity, suitable conditions for melon production are considered, such as varieties, climatic considerations, soil kinds and qualities, irrigation, and illnesses [4]. Several melon genotypes are grown in different parts of ailand. It had been imported from other countries and was bred by ai breeders. The research report on melon breeding and genetics, on the other hand, is inadequate

Methods

Results

Conclusion