Interrelationships among traits and morphological diversity of wheat (Triticum aestivum L.) accessions in base collection of Plant Genetic Resources Institute, Albania | Razmerja med lastnostmi in morfološko raznolikostjo akcesij krušne pšenice (Triticum aestivum L.) iz osnovne zbirke Plant Genetic Resources Institute, Albanija

Inglés. The object of the study was the evaluation of the morphological variability of 92 wheat germplasm (Triticum aestivum L.) part of ex situ collection of Plant Genetic Resources Institute, Agricultural University of Tirana. Principal components and cluster analysis were carried out involving 8 quantitative traits, such as tiller capacity, plant height, spike length, number of spikelet per spike, number of seeds per spikelet, number of seeds per spike, seed size and of seeds per spike. Plant height showed positive significant correlation with yield contributing traits as spike length (r = 0.560) and the number of spikelet’s per spike (r = 0.305). The number of grains per spike had a significant positive relationship with the mass of grains per spike. Three principal components exhibited about 66.42 % of variability where two PCs components influenced mostly the variability (PC1 with 28.1 % and PC2 with 24.43 %). Accessions were grouped into three major clusters based on complete linkage, suggesting for a variance at the level of 27.50 % within a class and 72.50 % between classes. The results suggested that plant height, spike length, number of spikelet per spike were the most important characters in differentiating the genotypes.

Esloveno. Predmet raziskave je bilo ovrednotenje morfološke variabilnosti 92 genotipov navadne pšenice (Triticum aestivum L.) iz ex situ zbirke Inštituta za genetske resurse (Plant Genetic Resources Institute), Kmetijske univerze v Tirani (Agricultural University of Tirana). Analiza glavnih komponent in klasterska analiza sta bili izvedeni na 8 količinskih lastnostih kot so sposobnost bilčenja, višina rastlin, dolžina klasa, število klaskov v klasu, število semen v klasku, število semen na klas, velikost semen in masa semen na klas. Višina rastlin je pokazala značilno pozitivno korelacijo z lastnostmi, ki so povezane s pridelkom kot je dolžina klasa (r = 0,560) in število klaskov na klas (r = 0,305). Število zrn na klas je imelo značilno pozitivno povezanost z maso zrn na klas. Tri glavne komponente so pokazale 66,42 % variabilnosti od katerih sta dve prispevali večji del (PC1 28,1 % in PC2 24,43 %). Akcesije so se združevale v tri glavne povezane skupine, kar kaže, da je bila variabilnost znotraj razreda 27,50 % in 72,50 % med razredi. Rezultati kažejo, da so najpomembnejše lastnosti, po katerih se razlikujejo genotipi višina rastlin, dolžina klasa in število klaskov na klas.