Stability of wheat genotypes in condition of Lushnja region

KRENAR XHELO¹, FETAH ELEZI^2*

¹Department for Plant Production, Agricultural University of Tirana, Tirana, Albania

²Centre for Genetic Resource, Agricultural University of Tirana, Tirana, Albania

*Corresponding author e-mail:elezi_fetah@yahoo.com

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Abstract

The aim of this research is the selection of most suitable wheat cultivars for the region of Lushnja. Ten new cultivars and six know cultivars (three local and three foreign) were planted in this area in 2012 and 2013. The experiments were implemented through the randomized block scheme, with three repeats. The climate conditions presented remarkable difference between the two years of the testing. The year 2012 conditions were suitable for wheat development. On the other hand, the year 2013 was characterized by unsuitable conditions. The main indicators studied were the morphologic ones, the phenologic phases and the biometric parameters such as: Plant height, Spike length, grain per spike, g1000 kernel weights. The average difference of production between the two years is 18%, while the difference of the biannual difference reached at 50%. The variance analysis was calculated for each year of production (tha, -1) and for each cultivar. From the analysis it was shown that nine cultivars are above the average production level. The most stable cultivars for the two years of study were G08, G07 and G02. The interaction between cultivars x years presents different levels for yield stability. The comparisons for all couples were implemented using the Tukey-Kramer HSD Method. The positive values show the couples that present verified differences.

Keywords: Cultivar, randomized block scheme, variance analysis.