Paper Details

Nonparametric stability analysis of forage yield for Agropyron elongatum accessions under different environments

Shadi Heydari, Mohsen Farshadfar, Hooshmand Safari

DOI: http://dx.doi.org/10.12692/ijb/5.4.94-98

Int. J. Biosci. 5(4), 94-98. August, 2014. (PDF)

Abstract:

The most important role in the breeding for creation of the new varieties has their stability in different environments. To stability analysis the forage yield and yield components of 18 accessions of Agropyron elongatum an field experiment seasons was conducted based on randomized complete block design (RCBD) with three replications during three cropping seasons at the Research Field Station of Islamabad Gharb and Researches Center and Natural Resources of Kermanshah, Iran. The moisture level in one of the experiments was irrigated condition (100% field capacity) while the second experiment was conducted under drought stress (Rainfed). The results of present study showed that accessions G15, G10, G5 and G14 had the most forage yield and yield components under different conditions. Nonparametric stability analysis revealed that the accessions G2, G6, G17 and G15 had the most yield stability. The visualizing graphics of principal component analysis (PCA) indicated that two fires components together explained 81.57% (PC1 = 66.75 and PC2 = 14.82%) of the total variation. Our findings suggested the accessions of G10, G14 and G15 which had a reliable stability along with high yield, can be introduced for breeding programs in Kermanshah climate condition