Identification and mapping of physiological-agronomic determinants of spring soft wheat ( Triticum aestivum L.) in dosegradient of nitric nutrition

In spring soft wheat ( Triticum aestivum L.) with the use of ITMI mapping population, which was obtained as result of crossing of spring wheat the Opata 85 variety with W7984 synthetic hexaploid, isolated during hybridization of Triticum tauschii (Coss.) Schmahlh. [syn. Aegilops tauschii Coss., Aegilops squarrosa auct. non L.] (accession CIGM86.940, DD) and tetraploid wheat the Altar 84 (AABB) on different backgrounds on N (without of nitrogen fertilizer, with half and overall dose of nitrogen fertilizer) the authors identified and located on chromosomes 122 QTL (quantitative trait loci). The part of phenotypic variability was established, which determined by each of revealed QTL. The authors detected the significant correlation between established loci and polymorphism on that or other determinant, which was characterized on basis of threshold value of logarithm of odds of LOD-score. The complex estimation of compared average quantities on nitrogen doses was made by variance analysis with calculation of parameters of determinant variations. The coefficients of correlation permit to determine a character adjoined correlation between determinants and gradient of doses of nitrogen nutrition. The obtained data suggests that the combining of specific QTL, revealed in soils with low content of mineral nitrogen and which became in different ecological conditions, can be used for isolation of variants with stable crop capacity.