African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6574

Full Length Research Paper

Genetic divergence and cluster analysis studies of different apple genotypes using D2 statistics

Girish Sharma1, Nirmal Sharma2*, Rubiqua Bashir1, Amit Khokhar2 and Mahital Jamwal2
1Department of Fruit Breeding and Genetic Resourses, Dr. YSP UHF, Solan, HP, India. 2Division of Fruit Science, SKUAST-J, Jammu and Kashmir, India
Email: [email protected]

  •  Accepted: 08 August 2013
  •  Published: 26 September 2013

Abstract

Medium quantum of genetic divergence was observed among sixteen apple genotypes under the present study. All the genotypes, on the basis of total variability were grouped into four distinct clusters. Maximum number of cultivars were accommodated in Cluster IV (Fuji, Gala, Jonadel, Jonagold, Red Fuji, Royal Gala and Spijon) followed by Cluster I (Arlet, Ruspippin, Sinta and Summerred), Cluster III (Crimson Gold, Elstar and Neomi) and Cluster II (‘Spartan’ and ‘Quinte’). Cluster IV had highest intra cluster value so was most divergent and Cluster I having least intra cluster value was least divergent. Highest value for inter cluster distance was recorded between Cluster I and II while it was lowest between Cluster III and IV. Cluster means were maximum in Cluster II followed by Clusters I, III and IV. Neomi is best cultivars for fruit yield/plant, fruit length, fruit diameter, fruit weight, total sugars and non-reducing sugars. However, Jonagold is best for TSS. Cultivars Spartan, Elstar, Royal Gala, Jonagold and Summerred would prove best for different vegetative characters.

 

Key words: Apple, cluster analysis, D2 statistics, genetic divergence