• 제목/요약/키워드: Jata

검색결과 5건 처리시간 0.015초

Ex-situ Stabilization and Utility Prospects of 'Jata' Ecorace of Tropical Tasar Silkworm Antheraea mylitta Drury

  • Hansda, G.;Reddy, R. Manohar;Sinha, M. K.;Ojha, N. G.;Prakash, N. B. Vijaya
    • International Journal of Industrial Entomology and Biomaterials
    • /
    • 제17권2호
    • /
    • pp.169-172
    • /
    • 2008
  • Indian tropical tasar silkworm, Antheraea mylitta D is reported to have forty four ecoraces by way of their adoption to different topographical and vegetational conditions. Of late, another ecorace 'JATA' - univoltine under in-situ condition has been explored which is localized in Thakurmunda area of the foot hills of Simlipal biosphere (Mayurbhanj district) of Orissa, India. The ecorace 'Jata' exhibits superior economic characters over widely commercialized ecoraces of Daba and Sukinda. The cocoon production of localized 'Jata' ecorace is depleting day by day in in-situ condition. In the present study, efforts were made to stabilize the ecorace 'Jata' under ex-situ condition at Ranchi (Jharkhand), where the 'Jata' ecorace silkworms were reared on Terminalia tomentosa for four successive generations during 2006 and 2007 and the cocoons were preserved in grainage house under prevailing climatic conditions. The results indicated change in voltinism behaviour of the 'Jata' ecorace from univoltine to bivoltine. The rearing performance and grainage efficiencies indicate the tendency of 'Jata' ecorace towards acclimatization and stabilization under Ranchi climatic conditions. The 'Jata' ecorace manifests the prospects for acclimatization, stabilization and commercial exploitation.

The Impact of Hybrid Vigour on Commercial Traits of the Indian Tropical Tasar Silkworm, Antheraea mylitta Drury (Lepidoptera: Saturniidae)

  • Reddy, Rangareddygari Manohar;Suryanarayana, Nagabathula;Rai, Suresh;Sinha, Manoj Kumar;Hansda, Ganga;Ojha, Nand Gopal;Prasad, Bhagwan Chandra
    • International Journal of Industrial Entomology and Biomaterials
    • /
    • 제20권2호
    • /
    • pp.61-67
    • /
    • 2010
  • The bivoltine tropical tasar ecoraces of Antheraea mylitta Drury produces cocoons for seed production under seed crop rearing (July-August with $22{\sim}30^{\circ}C$ temperature and 50~70% relative humidity) and for silk production under commercial crop rearing (September-December with $17{\sim}27^{\circ}C$ temperature and 60~80% relative humidity). To consider the impact of hybrid vigour on egg, larva, cocoon and silk related commercial traits, the $F_1$ hybrids made among Daba, Jata and Raily ecoraces were assessed successively for three years. The hybrid vigour in the $F_1$ hybrid of Daba$\times$Jata ($T_7$) was positive for egg fertility (+23.1%), shell weight (+25.6%), silk yield (+79.0%) and filament length (+68.1%), with filament of high denier (11.98d) and reduced larval span (-7.1%). The Jata$\times$Daba ($T_8$) hybrid has shown negative heterosis in egg fertility (-8.0%) compared to the other F1 hybrids, Daba$\times$Raily ($T_9$) and Raily$\times$Daba ($T_{10}$), when they rise simultaneously during the commercial crop season. The better performance of parental ecoraces ($T_4$ to $T_6$) in their commercial traits during commercial crop over parents of seed crop ($T_1$ to $T_3$) and the superior performance of $F_1$ hybrids ($T_7$ to $T_{10}$) over parents of commercial crop ($T_4$ to $T_6$) during commercial crop season indicates the apparent hybrid vigour in tasar $F_1$ hybrids. As the Daba$\times$Jata ($T_7$) and Jata$\times$Daba ($T_8$) $F_1$ hybrids have shown highest hybrid vigour, their rearing during commercial crop can optimize the silk productivity and commercial sustenance of the tasar silk industry.

Silk Filament Progression with Backcross Breeding Generations in Tropical Tasar Silkworm, Antheraea mylitta D

  • Reddy, Rangareddygari Manohar;Suryanarayana, Nagabathula;Sinha, Manoj Kumar;Gahlot, Nand Singh;Hansda, Ganga;Ojha, Nand Gopal;Prakash, Nanjappa Basappa Vijaya
    • International Journal of Industrial Entomology and Biomaterials
    • /
    • 제19권1호
    • /
    • pp.187-192
    • /
    • 2009
  • Silk filament progression study applying backcross breeding with recipient parent Jata and donor parent Daba ecoraces of tropical tasar silkworm, Antheraea mylitta Drury conducted during 2006 to 2008, revealed introgression of filament denier (10.2 d) superior to both parents at BC4 level. Also, the silk waste (0.35%) and filament breaks (2.6 nos) were reduced compared to both parents, while the filament length (973 m) and non break filament (296 m) improved over donor and could attain closer to recipient parent. The best performance of Jata $\times$ Daba at F1 level, with highest silk filament length (1646 m) of 12.5 d denier, denotes heterosis impact on silk trait with parental heterogenousity, an advantage to exploit silk filament yield. The progression of quality in terms of finer filament denier, less silk waste and least number of filament breaks over both parents and improvement in filament length and non break filament over donor parent except for a marginal shortage against recipient at BC4 level indicates the prospects of Jata and Daba ecoraces as source of breeding material for qualitative improvement of tasar silk filament. The study suggests that the commercially important finer denier of tasar silk filament can be attained with minor reduction in silk yield of wild Jata ecorace by adopting repeated backcrossing for four generations with semi domesticated Daba ecorace.

Java 기반 이동 에이전트 시스템의 실행 환경 보호 방안 (A Protection of Execution Environment in Jata-based Mobile Agent System)

  • 한명진;신정화;신원;이경현
    • 한국멀티미디어학회:학술대회논문집
    • /
    • 한국멀티미디어학회 2001년도 춘계학술발표논문집
    • /
    • pp.488-491
    • /
    • 2001
  • 사용자의 권한을 위임받아 다양한 네트워크 환경에서 원하는 작업을 수행하는 이동 에이전트 시스템이 현재 Java 언어를 기반으로 구축되고 있다. 본 논문에서는 악의적인 에이전트 동작으로부터 시스템을 보호하고 그 동작을 제한·추적하기 위한 이동 에이전트 실행 환경 보호 모델을 제안하고 구현 환경에 대하여 논의한다.

  • PDF

Single Life Time Cytological Screening in High Risk Women as an Economical and Feasible Approach to Control Cervical Cancer in Developing Countries Like India

  • Misra, Jata Shankar;Srivastava, Anand Narain;Das, Vinita
    • Asian Pacific Journal of Cancer Prevention
    • /
    • 제16권3호
    • /
    • pp.859-862
    • /
    • 2015
  • In view of funding crunches and inadequate manpower in cytology in developing countries like India, single lifetime screening for cervical cancer has been suggested. In this study, an attempt was made to cscreening to make it more effective for early detection. Cytological data were derived from the ongoing routine cervical cytology screening program for women attending Gynaecology Out Patient Department of Queen Mary's Hospital of K.G.Medical University, Lucknow, India during a span of 35 years (April 1971 - December 2005). Cervical smears in a total of 38,256 women were cytologically evaluated. The frequencies of squamous intraepithelial lesions of cervix (SIL) and carcinoma cervix were found to be 7.0% and 0.6%, respectively, in the series. Predisposing factors related to cervical carcinogenesis were analyzed in detail to establish the most vulnerable groups of women for single life time screening. The incidence of SIL and carcinoma cervix was found to be maximal in women above the age of 40 years irrespective of parity and in multiparous women (with three or more children) irrespective of age. The incidence of cervical cytopathologies was significantly higher in symptomatic women, the frequency of SIL being alarmingly higher in women complaining of contact bleeding and that of carcinoma cervix in older women with postmenopausal bleeding. It is consequently felt that single life time screening must include the three groups of women delineated above. Such selective screening appears to be the most economical, cost effective and feasible approach to affordably control the menace of cervical cancer in developing countries like India.