Study on New F1 Silkworm Hybrids with regards to the Values of Some Quantitative characters Influencing Silk Production

Krasimira Avramova

Abstract: The present research paper aims at studying the newly created silkworm hybrids regarding some important quantitative characters, which have influence on silk production. The study was conducted in the Agricultural University of Plovdiv in the period 2020–2021. The following newly created F1 hybrids were examined: Vratsa 63хLine22 х Nig2хMerefa6 and Nig2хMerefa6 х Vratsa 63хLine22. The industrial hybrid Super 1 x Hesa 2 was used as a control. The received results showed that the new hybrids domineered over the regional hybrid Super 1 x Hesa 2 with relation to the values of the following features: eggs hatchability, pupation rate, as well as shorter larval period duration and the fifth instar duration. These four quantitative characters are of a great importance for receiving high yields of cocoons with a lower own-value.

Keywords: Bombyx mori L.; hybrids; quantitative characters

Date published: 2022-12-21