Evaluation of Genetic Diversity Among the Superior Walnut Genotypes Based on Pomological and Phenological Traits in Chahar Mahal va Bakhtiari Province

S. A. Mousavi,; M. Tatari,; H. Moradi,; D. Hassani,

doi:10.22092/spij.2017.111264

Evaluation of Genetic Diversity Among the Superior Walnut Genotypes Based on Pomological and Phenological Traits in Chahar Mahal va Bakhtiari Province

Authors

10.22092/spij.2017.111264

Abstract

One of the methods in walnut breeding is identification and selection of the best genotypes in different regions of the country. To achieve promising genotypes in Chahar Mahal va Bakhtiari province, this research carried out in walnut growing areas of the province. Some phenological and pomological traits of 58 selected walnut genotypes were evaluated based on the IPGRI descriptor during three years. Analysis of variance showed significant differences among genotypes for all traits. The highest kernel percentage (62.88) and the lowest shell weight (4.27 g) belonged to the genotype 20. The late leafing genotype was genotype 3. The most productive genotypes were genotype 18 and 42 (code number 9). Genotype 21 produced the highest nut weight (17.28 g) and kernel weight (10.11 g). Results of correlation analysis showed significant negative and positive correlations between some important traits. Based on cluster analysis, genotypes with desirable traits of kernel and nut were separated from other genotypes. By principal component analysis, effective characteristics were categorized in seven groups that explained 75.35% of total variance. In diplot analysis, differences among genotypes were evident and supported the results of cluster analysis. Finally, genotypes 3, 5, 15, 18, 20, 21, 22 and 42 were recognized as promising genotypes and recommendable for orchard establishment and for use in breeding programs.

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