Umirzak Daniyarov, Anzura Suvonova, Nigora Soxibova
There is no difference in performance in systems with plus and minus selection. In the F-1 and F-3 systems where viability plus selection
was performed, cocoon weight values were 1.84 g and 1.85 g, and shell weights were 432 mg and 422 mg, respectively. In practice, the minus selection does not differ from those of the conducted F-2 and F-4 systems-1.72 g and 1.85 g, respectively; 394 mg and 420 mg. Clearly, the choice of viability leads to the accumulation of recessive hemispheric and subletal genes in the homozygous state in the system. As a result, some organisms die at different stages of development. But some of them survive. Probably on the one hand, because harmful genes are less accumulated, and on the other hand, because there are enough positive genes to compensate for the
effects of harmful genes, i.e., the GCC is formed. Had this process not taken place, no doubt the system would have perished as a result of negative selection over several generations. It follows that GCC does not occur in systems with high viability. The predominance of
positive genes over negative genes is achieved without them. In addition, the process of mutation is accelerated under the influence of negative selection.
Thus, not only the reserve but also the newly emerging genes remainthe source for the blocks of both categoriesThis increases gene diversity
