Resistance to Bombyx mori Densonucleosis Virus Type 1 and its Inheritance in Silkworm, Bombyx mori L.
2
조회
0
다운로드
0
인용
0
참고문헌
초록
Abstract
Bombyx mori densonucleosis virus type 1 (BmDNV1) - a non occluded virus causes flacherie disease in the susceptible stocks of the silkworm, Bombyx mori. However, some stocks are non-susceptible. Non-susceptibility to BmDNV1 in B. mori is a unique case where the virus infection is completely inhibited by a single gene of the host. A survey conducted by this institute in some parts of Karnataka state has revealed that, 43.05% of the total incidence of flacherie disease caused by non-occluded viruses, are due to the synergistic infection of B. mori densonucleosis and infectious flacherie virus. Earlier study indicated that rearing of BmDNV1 resistant silkworm stock is effective in protecting silkworm against BmIFV also. In the present study the response of 78 silkworm stocks which include 42 of non-diapausing and 36 of diapausing groups, to BmDNV1 is investigated. Newly ecdysed third instar larvae were inoculated per-os with 10% inoculum of BmDNV1 extracted from the mid-gut of infected silkworm. One non-diapausing and three diapausing silkworm stocks were found to be resistant to BmDNV1. Eleven silkworm stocks were found to possess moderate resistance whereas rest sixty three were found to be susceptible to BmDNV1. Genetic analysis has shown that the resistance to BmDNV1 is autosomally inherited and controlled by a major dominant or a major recessive gene in different silkworm stocks. These resistant stocks can be utilized as the resource material to develop BmDNV1 resistant commercial hybrids. The selection strategies, depending upon the mode of inheritance of resistance in the resource material chosen, are discussed.
참고문헌 (11)
- Shimada, "Detection of densonu-cleosis virus in the silkworm Bombyx mori from fecal speci-mens by polymerase chain reaction", pp.376~62 381 (1993)
- Eguchi, "Dominant non-sus-ceptibility to densonucleosis virus in the silkworm", pp.177~55 178 (1986)
- Eguchi, R.,, "Breding of the silkworm race Taiseinon-susceptible to a densonucleosis virus type 1. J. Seric. Sci. Jpn", 67, pp.361~366 (1998)
- Maeda, "Immunofluoresence obser-vation of the infection of densonucleosis virus in the silk-worm", pp.98~101 (1978)
- "Determining the mode of inheritanceof pesticide resistance with back-cross experiments", pp.703~712 (1991)
- Watanabe, "Resistance of the silkworm", pp.131~139 (1986)
- Watanabe, "Densonucleosis of the silkworm", pp.114~117 (1994)
- Watanabe, "Comparative histopathol-ogy of two densonucleosis in silkworm", pp.287~290 (1988)
- Watanabe, "Genetically determinednon-susceptibility of the silkworm Bombyx mori to infectionwith a densonucleosis virus", pp.370~373 (1981)
- Watanabe, "Histopathology of the midgut epithelium of the silkworm Bombyx mori infected with a newly isolated virus from theflacherie diseased larvae", pp.29~45 34 (1976)
- Watanabe, "A historical aspect on theepizootics of densonucleosis in the silkworm", pp.472~50 477 (1981)