Adaptability and stability of new soybean genotypes

Abstract

The work on soybean breeding conducted at the Institute of Field and Vegetable Crops in Novi Sad, results each year in the development of a number of new soybean lines that are tested in both Varietal Commission trials and in a macrotrial network which covers all important regions of soybean growing in the country. The purpose of die latter network was to test the reaction of new material to different agroecological conditions, so that most suitable variety can be recommended for each region. Adaptability and stability of genotypes were measured using genotype-yield regression coefficient related to the average yield of all genotypes in the locations investigated over three years. Growing conditions were different over the years, so that the investigated genotypes showed different stability levels, because mean value of all genotypes was used as standard, and, by definition, stability of the genotype applies only in relation to die other genotypes tested. However, die line NS-L-330219 showed stability above the average (b lt l) in each of the three years, while it achieved highest yields in two of die three years.

Reakcija novostvorenih genotipova soje na različite agroekološke uslove gajenja testirana je u mreži makroogleda lociranih u svim važnijim rejonima gajenja soje u našoj zemlji tokom tri godine. Adaptabilnost i stabilnost merena je koeficijentom regresije prinosa genotipa u odnosu na prošek prinosa svih genotipova u ispitivanim lokalitetima. Uslovi za proizvodnju soje bili su veoma različiti u sve tri godine, pa su i ispitivani genotipovi ispoljili različite nivoe stabilnosti. Linija NS-L-101136 imala je koeficijent regresije (b) značajno veći od l u sve tri godine, što znači da je pogodna za gajenje u povoljnim uslovima uz visoku agrotehniku, dok je linija NS-L-330219 ispoljila nadprosečnu stabilnost (b lt l) u sve tri godine, a najveći prinos ostvarila je u dve od tri godine.