Genetic diversity of Macedonian embroidered pepper (Capsicum spp.) based on fruit morphological traits

N. Sandeva Atanasova, M. Jankulovska, S. Ivanovska
Embroidered peppers have a long history of cultivation in the Republic of North Macedonia and noticeable divergent morphological traits. However, there is a lack of information on the genetic diversity of this germplasm which is a basis for proper conservation strategies as well as for designing an effective breeding program to improve its yield and yield components. This study was undertaken to assess the morphological diversity of fruits in 189 embroidered pepper genotypes based on six traits: fruit length, fruit width, fruit weight, fruit pedicel length, fruit wall thickness and number of locules. The experiment was conducted in 2018, using a randomized block design with two replications. The obtained morphological data for each genotype were subjected to principal component analysis (PCA) followed by Ward's cluster analysis using squared Euclidian distances. The principal component analysis showed that the first three principal components accounted for 83.1% of the total genetic variance among the genotypes. PC1 explained 50.6% of the total variance, mostly contributed by fruit weight, fruit width, and fruit wall thickness. The cluster analysis revealed five main groups, with a different number of subgroups within each group. This indicated significant genetic diversity between analyzed genotypes. Thus, there is a continuous need for additional characterization and conservation of this unique germplasm so that it can be further exploited and sustainably used.
Sandeva Atanasova, N. , Jankulovska, M. and Ivanovska, S. (2021). Genetic diversity of Macedonian embroidered pepper (Capsicum spp.) based on fruit morphological traits. Acta Hortic. 1320, 33-40
DOI: 10.17660/ActaHortic.2021.1320.4
Capsicum, embroidered pepper, principal component analysis, cluster analysis

Acta Horticulturae