|
چکیده
|
Sainfoin (Onobrychis viciifolia Scop.) as an ancient forage crop has garnered interest due to its desirable characteristics and adaptability. This investigation was designed to study genetic variation and interrelationships of sainfoin via factor analysis and clustering methods. Thirty-two local native genotypes were collected from various geographical regions and assessed based on a randomized block scheme with four replicates. The first five factors explained 85% of the variance and were named yield performance, plant morphology, powdery mildew, forage quality and forage palatability. The first factor described 58% of the variability, encompassed forage yield and its related characteristics like stem number per plant, main stem's nodes, length of the longest stem, main stem's internodes, stem's leaves, stem fresh weight, leaf fresh weight, inflorescence fresh weight, stem dry weight, leaf dry weight, fresh weight and dry weight per unit area. The dendrogram of sainfoin genotypes is categorized genotypes into three groups, which is confirmed via the Wilks’ lambda of multivariate analysis of variance. Group-1 contains 10 genotypes with the highest forage yield performance, and high amounts for most of the other remained traits. Group-2 contains 9 genotypes with the lowest performance for most traits of powdery mildew, suggesting their good potential for powdery mildew tolerance, while Group-3 contains 13 genotypes and indicated moderate performance for measured traits of sainfoin. The ten desirable genotypes of Group-1 mostly from northwest Iran, were good candidates for commercial release in Iran because they performed well and had high values of most traits, so they can be advised for cultivation in cool upland rainfed conditions of semi-arid regions.
|