Genetic divergence of indigenous pummelo genotypes

Jubair Al Rashid,Md Saidur Rahman,Md Salim,Md Sarowar Alam,Md Sultan Mia

doi:10.3329/ralf.v3i1.27856

Jubair Al Rashid, Md Saidur Rahman + Show 3 more

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https://doi.org/10.3329/ralf.v3i1.27856

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Abstract

The genetic divergence was studied in33pummelogenotypes using D2 statistics and principal component analysis at Regional Agricultural Research Station, BARI, Akbarpur, Moulvibazar during 2012 to 2014. The genotypes were grouped into 5 clusters and the maximum number of genotypes was included in cluster IV and V and the minimum number in cluster I. The inter cluster distance in all of the cases were higher than the intra cluster distance indicating wider genetic diversity among the accessions of different groups. The highest inter-cluster distance was observed between cluster I and II followed by cluster II and V and the lowest between III and IV. The highest intra- cluster distance was observed for the cluster II and the lowest for the cluster III. For cluster II, the highest mean values for plant height (6.13m), individual fruit weight (1141.67g), fruit length (13.03 cm) and breadth (13.15 cm), number of segments per fruit (14.41), number and weight of seeds per fruit (123.67 and 50.41g), yield per plant (50.94 kg) were observed. The first axis largely accounted for the variation among the pummelo accessions (26.16%) followed by second axis (18.75%). The first 8 axes accounted 90.56 % of the total variation. The characters individual fruit weight (g) and weight of seeds per fruit (g) showing positive value in both the vectors contributed maximum towards divergence. Considering magnitude of genetic distance, contribution of different traits toward the total divergence, magnitude of cluster means for different traits and performance the genotypes of cluster I, II, and IV may be considered as parents for future hybridization program.Res. Agric., Livest. Fish.3(1): 37-43, April 2016

Highlights

Pummelo(Citrus maxima) is known as one of the important commercial fruit tree under the genus Citrus (Verdi, 1988)
Considering magnitude of genetic distance, contribution of different traits toward the total divergence, magnitude of cluster means for different traits and performance the genotypes of cluster I, II, and IV may be considered as parents for future hybridization program
Its status as true or basic species with in Citrus is confirmed by other researchers (Barkley et al, 2006; Uzun et al, 2009;Froelicher et al.,2011; Garcia-Loret al., 2013).pummelo has been regarded as a parent of many citrus fruits, such as lemons, oranges and grapefruits

Summary

INTRODUCTION

Pummelo(Citrus maxima) is known as one of the important commercial fruit tree under the genus Citrus (Verdi, 1988). Its status as true or basic species with in Citrus is confirmed by other researchers (Barkley et al, 2006; Uzun et al, 2009;Froelicher et al.,2011; Garcia-Loret al., 2013).pummelo has been regarded as a parent of many citrus fruits, such as lemons, oranges and grapefruits. It is characterized for distinguished features of huge leaves borne on broadly winged petioles, very large and fragrance flowers and big fruits with a single embryo, while most of other Citrus species are polyembryonic (Uzun and Yesiloglu, 2012). Since published work on pummelo is scanty, the present study has been undertaken with 33 pummelo accession to understand the nature and magnitude of genetic divergence and the characters contributing genetic diversity by D analysis

MATERIALS AND METHODS

RESULTS AND DISCUSSION

CONCLUSION