Morphological characterization and hierarchical classification of 40 bush pea genotypes (Pisum sativum L.)

Abstract

The Universidad de Nariño is home to a collection of bush pea plantlets that are a source of biodiversity for the genetic improvement of pea species in Colombia. The characterization of these accessions is required to identify genotypes with attributes that could be used in the search for new varieties. For the morphological characterization, 40 pea accessions were planted in Pasto, Colombia. 23 quantitative variables and 12 qualitative variables were documented, descriptors proposed for this species by the European Union in 2003. The data were subjected to Principal Component Analysis and Multiple Correspondence Analysis. Finally, a hierarchical classification method was applied using Ward’s method. The first four components, which explained 78.80% of the total variability of the population, were selected for the quantitative variables. Four groups were identified. Genotypes with the afila gene, which are of interest for pea breeding programs, were found in groups 1 and 2. The highest seed weight was in group 1, and the genotypes with the best reaction to powdery mildew were in group four. For the qualitative variables, the first six factors, which described 60.51% of the variability, were selected, and the hierarchical classification analysis resulted in five groups. The qualitative characteristics that contributed more to the differentiation of the groups included leaflet type, hilum color, degree of curvature of the pod, color and shape of the grain.

​Morphological Characterization and Morphological Traits based Genetic Diversity Analysis of Farmer’s Pea (Pisum sativum L.) Varieties of Uttar Pradesh using DUS Descriptors, as per PPV and FRA, 2001

“…Similar studies of varietal characterization using DUS guideline have also been made in Pea by Singh et al (2014), Ardhani et al (2019), Kalapchieva et al (2020) and Rosero-Lombana and Checa-Coral (2021). Katiyar et al, (2010) in urdbean, Mall, (2011) in french-bean, Mounika et al (2020) in mung-bean, Durga et al (2015) in horse gram and Janghel et al, (2020) in chickpea, also evaluated their crops according to DUS guideline and they came to similar findings.…”

Agro Morphological Characterization and Diversity Assessment of Pea (Pisum Sativum L.) Germplasm Conserved in Genebank of Nepal

“…This group in particular stood out for taller plants 112.98 cm (average 87.87) and 100 seed weight 13.69 g (10.78 g). This trait is important yield attributing parameter and higher seed weight is also market preferred trait (Rosero et al, 2021).Second cluster is made up of 14 genotypes with 11.5% of the studied population corresponding to attributes pertaining to yield attributing parameters as pod length 5.8 cm( 5.3), pod width 5.9cm ( 5.7) and number of seeds/pod 6 (5). However, the genotypes are late maturing 159 days (150).…”