Comparative aluminum-resistance of soft spring wheat varieties bred in Siberia and European part of Russia
Initial material is a base of all breeding programs; its correct combination determines success and parameters of newly created varieties. So, laboratory investigation of soft spring wheat varieties bred in Siberia (42 varieties) having large areas of acid soils without exchangeable aluminum, and European part of Russia (31 varieties) where aluminum is a major stress factor of acid soils was conducted for compare its potential Al-resistance level. It was shown that samples having high level of Al-resistance may be found within both groups of varieties. Whole set of varieties was divided with claster analysis on 5 subgroups having different combinations of parameters of root length and root vigor both in control and in Al treatment. It was pointed out that sensitive varieties are absent in investigated set of varieties, number of moderate resistant varieties are equal (52.5 and 64.5% for Siberian and European varieties accordingly) but more high-resistance varieties belong to European group (26 and 32%). Group of Siberian varieties has seven times more moderately sensitive samples then European one (21.5 and 3%). The authors suppose that increasing of Al-resistant level of soft spring wheat varieties may be done indirectly parallel with aim-directed breeding for resistance against abiotic environmental factors of exact breeding center.
Keywords: soft spring wheat, acid soils, aluminum, resistance, genetic diversity