Coefficient Of Adaptability Research Articles

The article presents the results of environmental testing in the competitive variety trials of new varieties and perspective lines of spring barley was investigated at the experimental field of ISA-branch center FNAC VIM and FITS «Nemchinovka» in 2017-2019 g. In studies conducted in different moisture years among the rooms was a dedicated group of high-yielding and resistant to helminthosporium blights of varieties and perspective lines of spring barley. According to the obtained data, the assessment of selection numbers in ecological variety testing in the conditions of the Moscow and Ryazan regions allowed to establish a high average value (6,7-6,8 points) of complex resistance to reticulated and dark-brown spotting in the varieties Reliable, Raphael (GSI) and line 138/1-12 h 752. The lowest stability was noted in the variety Xanadu, which was 4.3 points. The conversion of absolute values into percentages allowed comparing the behavior of varieties in the test points in different years. Over the years of research varieties Vladimir, Reliable and Rafael, as well as breeding lines 138/1-12 h 752, 60/1-12 h 81, 181/3-12 h 897, 135/2-13 h 1068 as a result had an average coefficient of adaptability over 100 (Ka=101.0-112.4 %). The study of the variability of the stability index by years and points showed that in General, there is a differentiation in the stability of its manifestation by varieties. The selection line 138/1-12 h 752 and varieties Raphael, Vladimir, Reliable (V= 23,7-24,5%) were less variable, varieties Moskovsky 86, Nur and Xanadu (V= 34,61 – 64,0%) were more variable. The assessment of the indicator of the level and stability of the trait showed that in terms of plasticity and resistance to helminthosporiosis, varieties Reliable, Raphael and breeding line 138/1-12 h 752 are distinguished (Puss=110.7-112.4).

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