Abstract
This research was aimed at establishing high-quality and abundant cocoon cultivation in the country, to create new high-quality and nutritious mulberry varieties and gradually introduce them into production. In order to create local mulberry varieties, for the first time the viability of mulberry silkworm hybrids of mulberry varieties “Jararik-9”, “Jararik-10” was determined by the level of cocoon productivity and technological impact. The coefficient of leaves eating of new varieties of mulberry “Jararik-9”, “Jararik-10” by hybrid worms of silkworm was determined. The varieties of mulberry belonging to the genusMorus alba L.and hybrids belonging to the genusBombyx mori Lof the mulberry silkworm were taken as the study objects. For chemical analysis, leaf samples were taken and analyzed in the spring in the order established by the worms in the middle of the 5th year of development. Furthermore, the effect of new mulberry varieties on the growth dynamics of worm leaves was studied. The coefficient of leaves eating of new mulberry varieties by hybrid worms was determined. According to the results of the research, among the new selection numbers No3-02 and No7-02, the coefficient of assimilation of No3-02 and No7-02 is significantly higher than other selection numbers and “Tajik seedless” variety.
Highlights
In order to achieve high cocoon yields, it is necessary to create new high-yielding and nutritious mulberry varieties in the silkworm breeding base and to organize intensive mulberry plantations on their basis
It is scientifically well researched by a number of foreign authors that the selection lines of mulberry belonging to the Morus alba L. variety worldwide are suitable for different regions of the world and for different worm feeding seasons, long water storage properties and nutritional traits
The most pressing issues today in the country is the establishment of high-quality and abundant cocoon plantations, the creation and gradual introduction of new quality and nutritious leafy mulberry varieties, and their superiority over local mulberry varieties imported from China [2]
Summary
In order to achieve high cocoon yields, it is necessary to create new high-yielding and nutritious mulberry varieties in the silkworm breeding base and to organize intensive mulberry plantations on their basis. The Action Strategy for the Development of the Republic of Uzbekistan for 2017-2021 [2, 5] pays special attention to the development of agriculture, especially livestock, including silkworm breeding In this regard, it is pivotal to conduct research on the strengthening of the nutritional base of mulberry silkworms in the field of silkworm breeding and mulberry towards the creation and introduction into production of new varieties with high productivity, nutritional and nutritional properties. The number of scientific researches has been carried out on the creation of a number of mulberry varieties based on the care of industrial hybrids of mulberry silkworm, mainly free-pollinated mulberry leaves, and the advantages of the new mulberry hybrid and the production of different planting schemes of mulberry varieties [3, 6]. This research was intended to implement the tasks set out in the decisions "On additional measures for the further development of the silk industry"[4,5], and investigate an influence of mulberry silkworm hybrids, especially “Jararik-9” and “Jararik-10” on the viability, cocoon productivity and technological characteristics of mulberry varieties [8,9]
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