Stability analysis of inner stem length in cabagge genotypes (Brassica oleracea var. capitata L.)

Abstract

The stability of the core length of 21 cabbage genotypes (10 varieties and 11 hybrids) was studied over three growing seasons. The pooled analysis of variance revealed highly significant differences among genotypes, traits under investigation, and years, as well as, genotype by year interactions. The parameter stability test showed that six genotypes significantly deviated from the regression line. Only one of the six genotypes was cultivar and five were hybrids. The two hybrids are early ones, three of them are summer cultivars, and one cultivar is a late one. These genotypes had quite different regression coefficients around or above unit.

U radu je ispitivana stabilnost 21 genotipa kupusa (10 sorti i 11 hibrida) u tri vegetaciona perioda za svojstvo dužine unutrašnjeg kočana glavice. Združenom analizom varijanse su ustanovljene visoko značajne razlike između genotipova, ispitivanih godina kao i interakcije genotipxgodina. Test parametara stabilnosti je pokazao da šest genotipova značajno odstupa od linije regresije. Od ovih šest genotipova, jedna je sorta, a pet su hibridi. Dva hibrida spadaju u grupu ranih hibrida, tri su letnja, dok je samo jedan kasni. Ovi genotipovi su imali dosta različite koeficijente regresije, oko ili iznad jedinice.