Genetic Divergence among Inbred Lines of Pumpkin (Cucurbita moschata Duch Ex Poir)

M Zakaria,M M Hossain,M A T Masud,M A K Mian,B Ahmed

doi:10.3329/bjpbg.v29i2.33944

Abstract

Genetic divergence among nineteen inbred lines of pumpkin (Cucurbita moschata Duch Ex Poir) was estimated through principal component analysis and Mohalanobiss D2 analysis. Inbred lines were grouped into five clusters. Cluster I, II, III, IV and V were composed of five, three, four, six and one inbred lines respectively. Maximum inter cluster distance was observed between the cluster III and V (72.69) followed by the cluster I and V (63.33). Minimum inter cluster distance was observed between cluster II and IV (10.64). The mean value of cluster III indicated the importance of days to first male and female flower open, node order to 1st female flower open and TSS. Cluster IV showed the importance of days to first female flower open, fruit diameter, cavity diameter, flesh thickness and average fruit weight. Similarly, cluster V indicated the importance of yield per plant, fruits per plant and fruit length. Days to first male and female flower open, fruit length and cavity length had the highest contribution towards divergence among the inbred lines. Considering the magnitude of cluster distance, cluster means for different characters and contribution of characters towards divergence, the inbred lines from clusters I, III and IV could be selected as parent for hybridization program.

Highlights

INTRODUCTIONThe crop is variously known as ‘Misti kumra’ or ‘Misti lau’ or ‘Misti kadu’ in different parts of Bangladesh
Multivariate analysis is a useful tool in quantifying the degree of genotypic divergence in a biological population like an inbred population of pumpkin. It helps to assess the relative contribution of different components to the total divergence both at inter and intra-cluster levels (Das and Gupta, 1984). Efficient use of such genetically diverse parents has a bright scope for the development of high yielding open pollinated and hybrid pumpkin variety
The D2 value varied widely and principal component scores revealed a good degree of genetic diversity among the lines

Summary

INTRODUCTION

The crop is variously known as ‘Misti kumra’ or ‘Misti lau’ or ‘Misti kadu’ in different parts of Bangladesh It is consumed by most of the people of the country. Multivariate analysis is a useful tool in quantifying the degree of genotypic divergence in a biological population like an inbred population of pumpkin It helps to assess the relative contribution of different components to the total divergence both at inter and intra-cluster levels (Das and Gupta, 1984). Efficient use of such genetically diverse parents has a bright scope for the development of high yielding open pollinated and hybrid pumpkin variety. Keeping the importance of the above facts in mind, the present study was undertaken to analyze the genetic divergence of nineteen pumpkin inbred lines

MATERIALS AND METHODS

RESULTS AND DISCUSSION

II III IV V

CONCLUSION