[Long-term reproduction of triploid and tetraploid parthenogenetic clones of silkworms during artificial thermal parthenogenesis].

The triploid and tetraploid clones of the silkworm (Bombux mori L.) are capable to be reproduced for a long time by means of thermal parthenogenesis. The activated eggs are pigmented in 80-99%. The hatching of larvae in triploid clones amounts to 20% and in tetraploid ones to 25-30%. The pigmentation of eggs and hatching of larvae greatly vary in different years: 47 to 100% and 0 to 73%, resp. In this respect, the polyploid clones are similar to those diploid ones which are characterized by the low percentage of complete parthenogenesis. The causes for the variability of parthenogenesis indices in the polyploid clones are discussed.