3. Phenotypic diversity of garden peas for ecological agricultural production

Author: Slavka Kalapchieva, Tsvetanka Dintcheva, Ivanka Tringovska, Viliana Vasileva, Valentin Kosev


The aim of the present study was to determine the phenotypic diversity in 57 pea accessions determined by conventional CPVO descriptors. The study was conducted in the period 2019-2020 under irrigation conditions in the experimental field of the Maritsa Vegetable Crop Research Institute (MVCRI), Plovdiv, Bulgaria. Based on the analysis, the studied materials of peas do not have anthocyanin coloration; the majority of plants are medium tall with an average number of nodes up to and including the first fertile node; with green colour foliage; common leaf type; flecking stipules; white flowers and two pods per node. The pods are green, short and medium long with a medium width and the presence of a parchment; blunt shape of distal part (blunt ending); an average number of ovules from which develop an average of five light to dark green grains. Five groups of peas were differentiated according to the time of flowering according to CPVO-TQ / 007/2. The hierarchical cluster analysis was applied to identify the similarity and proximity of the garden pea accessions, and are grouped into two main clusters – A and B. The cluster B was the smallest and only genotype FR Ofe was involved in it with the highest values of the pod length and grains number per pod. Group „A“ was divided into two subgroups: „A2“ with genotype IZK-12, which differs in productivity expressed by the number and weight of pods and the weight of grains from a plant and subcluster „A1“ with all other plant genotypes.

Keywords: Pisum sativum L., CPVO descriptors, organic production