The proceeding of the 8'''ISB:440-443(2001) Application of Self-Fertilization Lines in Heterosis Selection of Buckwheat

The most effective way in the case of cross-pollination cultures is provided through the use of heterosis effect with participation of self-fertilization lines [2,4]. Need in homozygotation results from the fact that repeated re-seeding can bring about change in properties of heterozygous lines, and this can lead to loss of combination abilities of those. Furthermore, high homozygosity determines high uniformity of hybrids. Elaboration and implementation of programs for selecting buckwheat on the basis of heterosis is restrained in this direction by lack of selection at a high level self-consistent lines with a high combination ability, and of scientific knowledge on the level of inbred depression, as well as on cross-breeding, of those. Main reason of difficulties in forming inbreeding lines is in inbred depression in morphological characteristics and economic value. Depending on the level of inbreeding and on genotype, average values of inbred depression as to productivity characteristics- "mass of grain per plant "- in first generations of inbreeding (single or twofold inbreeding) gave the value of 0.39- 0.88, and in 7th- 8th generations those were 0.08- 0.22 (see Table 1). As to the characteristic "number of grain per plant", those are 0.36- 0.81 in first generations o