THE STABILITY OF YIELD AND QUALITY CHARACTERS IN SOME SOYBEAN GLYCINE MAX (L. MERR.) GENOTYPES PUBLISHEDSimona Elena IFRIM, Ioan HAS, Eugen MURESANU
Soybean occupies, as importance, the first place in the group of grain legumes due to its use in human nutrition, as a source of very good protein and oil quality, as herb and because it is a very good prior plant to the ground, leaving a reserve of 80 to 140 kg N/ha. The performances evaluation of genotypes for the yield stability and the quality characters (protein and oil content) in various environmental conditions is important in selection processes for the identification of genotypes adapted to large areas of culture. The objective of this study was to identify the soybean genotypes with high stability of yield and quality characters using variance (s 2 ), the determination of the genotypes stability noticed by high levels of protein and oil content using the cumulative index of selection. The research was conducted between the years 2007-2010, at ARDS Turda, in seven comparative trials (three orientation trials and four competition trials) organized in randomized blocks; each trial was composed of 25 variants, sowed in three repetitions. The chemical analysis (protein and oil content) were determined with NIR analyzer, Dickey-John brand, type INSTALAB 600. Among the varieties created at ARDS Turda, it noticed the high yield stability of the Onix and Mălina TD varieties, under high yield potential and Darina TD variety, with high stability of protein and oil content, but with a reduced stability of yield potential, although this character had an average relatively high. The genotypes Asgrow (with cumulative selection index of 107.4%), Condor (105.5%) and T23-5508 (102.9%) noticed concomitant for the stability of the protein and oil content and a high cumulative selection index. It is quite difficult to incorporate in the same genotype high values for the yield potential, the oil content and protein content, given that the same genotype has stability for all three characters with quantitative genetic determinism.
soybean genotypes; stability; yield; protein content; oil content;