• International Journal of Industrial Entomology and Biomaterials
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• 제12권2호
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• pp.81-86
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• 2006

Of all factors that govern productivity in sericulture, the role of silkworm egg is of prime importance. The production of silkworm seed involves a long chain of interdependent and highly specialized conditions. Female moths of Bombyx mori L. commence egg deposition immediately when the moths were decoupled. More than 60% of eggs are deposited within 4 hrs after decoupling i.e. 62.33% in CSR-3, 61.67% in CSR-6, 62.50% in CSR-16 and 63.28% in CSR-17. Almost 90% of eggs were laid in the first 12 hrs (93.13% in CSR-3, 90.81% in CSR-6, 89.71% in CSR-16 and 93.17% eggs in CSR-17) after decoupling. Almost 8 to 10% of more eggs were laid when oviposition period was prolonged upto 48 hrs instead of 24 hrs. The present investigation showed that a significant increase of 45 (8.34%), 50 (9.98%), 41 (8.26%) and 45 (8.30%) (P < 0.01) numbers of more eggs were found between 24 to 48 hrs (T6 to T9) in CSR-3, CSR-6, CSR-16 and CSR-17 races respectively. The findings of present investigation is very important for sericulture industry while producing layings to keep for different hibernation schedule especially for autumn/late autumn crop, female may be allowed for prolonged oviposition to get 8 -10% more eggs and farmer may fetch 8 -10 kg. more cocoon yield/l00 dfls with more income.

• 한국잠사곤충학회지
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• 제6권
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• pp.28-30
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• 1966

현재의 우리나라 장려품종을 공시하여 잠용비중에 의한 자웅분리방법을 조사하였든 바 다음과 같은 몇 가지 결과를 얻었다. 1) 현장려품종의 잠용의 비중은 1,000∼l,100 범위내에 속한다. 2) 식염수의 비중이 1,020전후에서 자용은 저부에 가라앉고 웅용은 상층 즉 식염수 표면가까이 뜬다. 3) 식염수의 비중 1,020전후에서는 잠용에 아무런 악영향이 없었을 뿐만 아니라 발아비율과 산란수에 나쁜 영향을 주지 않았다. 4) 식염수 처리가 보다 광범위한 실용형질에 미치는 영향에 관한 시험은 다음 기회로 미루고 잠견절개기의 고안이 선행되어야 한다.

• International Journal of Industrial Entomology and Biomaterials
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• 제26권1호
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• pp.13-21
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• 2013

Boil-off loss ratio is one of the most important economic traits to be considered during the course of silkworm breeding. The boil-off loss ratio varies among the breeds and seasons. The present study was undertaken with 5 oval and 5 peanut breeds and twenty five hybrids involving these parents to select the promising hybrids with desired boil-off loss ratio. Accordingly, studies were undertaken to estimate the heterosis and heterobeltiosis. It was observed that majority of the hybrids revealed negative heterosis for boil-off loss ratio which is desirable. Based on the heterosis and heterobeltiosis, among all the hybrids, the hybrid APBRO5 ${\times}$ APBRD5 exhibited highest negative heterosis for boil-off loss ratio and also exhibited highest EI value (64.5) for the quantitative and qualitative traits. Based on the hybrids performance, boil-off loss ratio, heterosis and heterobeltiosis and evaluation index, the hybrids viz. APBRO5 ${\times}$ APBRD5, APBRO1 ${\times}$ APBRD1 and APBRO3 ${\times}$ APBRD4 were identified for commercial exploitation.

• International Journal of Industrial Entomology and Biomaterials
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• 제5권1호
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• pp.23-32
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• 2002

The introduction of hybrid and exploitation of heterosis has played a vital role in Indian sericulture industry, which clearly depicts a quantum jump in silk production during the last four decades. Since, the introduction of heterosis, progress in silkworm breeding has depended on success or failure in identifying better combiners. Systematic procedures developed have enabled the breeders to identify the best combiners by combining ability test, line ${\TIMES}$ tester analysis or $D^2$ analysis for maximum expression of heterosis. The level of heterosis expressed in the crossbreed population is determined by the interaction between genotype and prevailing environmental factors. Except some of the pre and post cocoon parameters, heterosis is invariably higher in single crosses compared to three-way and double crosses. However, during hot and humid season, when rearing of F1 bivoltine hybrid is unsuccessful at field level and indigenous races results in very low and poor quality yield, three-way and double crosses can play an important role as an intermediary technology. The objective of this article is to review briefly the concept and causes of heterosis, utilization of different forms of heterosis in silk production and its significance in silkworm, Bombyx mori breeding.

• International Journal of Industrial Entomology and Biomaterials
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• 제20권2호
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• pp.115-116
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• 2010

The Eolrukmal and Hukpyobeom varieties were bred for special purpose such as experience and education. The Eolrukmal variety was selected and succeeded from the $F_1$ of Huka$\times$Galwon in 2004 summer. It has stripes and brown half-moon body marks. The Hukpyobeom variety was selected and succeeded from the $F_1$ of Remone$\times$Hukho in 2004 summer. It has black body color and bright yellow segments. They are healthy yellow cocoon spining varieties showing over 93% of high practical hatching ratio and 93.1% of emergence ratio. The Eolrukmal moth laid 450 egg/batch and the Hukpyobeom moth laid 440 egg/batch.

• International Journal of Industrial Entomology and Biomaterials
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• 제35권2호
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• pp.83-88
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• 2017

Silk is appealing materials for many biomedical applications involving tissue engineering and implantable devices, because of its biocompatibility, environmental stability, controlled proteolytic biodegradability and morphologic flexibility. Silk matrix is required for the treatment of a wide wound area, but the present silk matrix is made by the second processing, and thus, the labor and the cost are high. In this work, we investigated the optimal production condition of natural silk 3D matrix using the silkworms and invented Automatic Silk Matrix Making Machine (ASMMM) for natural silk 3D matrix production. As a result, we determined that optimal production condition for making A4 paper size natural silk 3D matrix was used Rough aquarelle paper on surface at $25^{\circ}C$ and 30 silkworm larvae. These results are expected to provide basic data for the efficient production of the natural silk 3D matrix, and it is suggested that the produced natural silk 3D matrix is useful as a medical biomaterials.

• 한국잠사곤충학회지
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• 제46권2호
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• pp.54-57
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• 2004

다수성 품종으로 육성된 부흥잠은 새로운 가을누에 품종으로서 육성경위와 주요특성을 요약 하면 다음과 같다. 1. 일본종계 원종 잠149와 도입 육성한 무늬 품종이며, 중국종계 원종 잠150은 도입 육성한 강건다수성 한성무늬 누에품종이다. 2. 부흥잠의 일본종계 원종인 잠149은 조사된 주요 양적형질 중 화용비율, 견층비율 및 견사장에서 일반조합능력(GCA)이 높았고, 중국종계 잠150은 견층비율 및 견 사장에서 GCA가 높게 나타났다. 3. 2003년 추잠기 지역적응시험 결과는 부흥잠이 다수견, 다사량의 특성을 지닌 대성 잠에 비해 전견중이 무거워 고치수량이 6% 증수되었다. 4. 조사성적에서는, 견사장은 1,274 m로 대조대비 지수로 3%가 떨어지나, 섬도가 굵고 견사량이 많아 1만두 생사량이 3.68 kg/만두로 대조 대비 지수로 7%높아 다사량의 특성을 나타내었다. 5. 잠종생산능력에 있어서는 일본종계 원종 잠149의 산란수는 525개로 대성잠의 일본종계 원종인 잠125과 같은 수준이었고 중국종계 원종 잠150의 산란수는 510개로 대성잠의 잠126보다 다소 적었으나 산란성은 우수한 편이었다.

• 한국잠사곤충학회지
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• 제14권1호
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• pp.25-35
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• 1972

육잠기술이 수견량에 미치는 영향의 정도를 알고져 1971년 춘잠기 및 추잠기에 경기도 화성군 정남면 보통리와 용수리 소재 양잠농가중 14호를 선정하여 70년도 상자당 수견량이 평균이상 농가를 상위 농가로 평균이하 농가를 하위농가로 구분하고 71년도에는 이들 농가에게 각농가의 상전상엽을 공유제로 하고 사육조건을 통일시킨 조건하에서의 사육 결과로서 육잠기술이 상자당 수견량에 미친 영향력을 추정했다. 그 결과는 다음과 같다. 1) 육잠기술이 상자당 수견량에 미치는 영향력은 이들 14개 상하위 양잠농가를 기준 한다면 춘잠기 15% 추잠기 33%이다. 2) 사료조건이 상자당수견량에 미치는 영향력은 이들 14개 양잠농가를 기준한다면 춘잠기 56% 추잠기 69%이며 이에는 기상조건의 상승효과가 포함되어진 것으로 추정된다. 3) 하위농가의 육잠기술중 가장 중요하게 미치는 저위생산요인은 소독의 불이행인것 같다.

• International Journal of Industrial Entomology and Biomaterials
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• 제23권2호
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• pp.187-191
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• 2011

An attempt was made to assess the potentiality of bivoltine double hybrids under simulated conditions of farmers to identify the suitable bivoltine double hybrid combination. Four bivoltine double hybrids developed at Central Sericultural Research and Training Institute (CSRTI), Mysore along with popular single hybrid, $CSR2{\times}CSR4$ as control was assessed for economic traits. The rearing results showed significant improvement of 20-24% in fecundity of the double hybrids studied over single hybrid. Among the double hybrids, $[D7{\times}S5]{\times}[D13{\times}S1]$ recorded significantly higher survival (89.58 %), cocoon yield (76.328 kg/ 50,000 eggs), cocoon price (Rs. 180.87/kg) and lower cocoon leaf ratio of 1: 21.80. The performance of the reeling traits were also found significantly superior in $[D7{\times}S5]{\times}[D13{\times}S1]$ with higher filament length (1100 m), reelability (88%), raw silk (18.55%) and neatness (92 points) compared to $CSR2{\times}CSR4$ and other double hybrids evaluated. Besides, the cocoons of $[D7{\times}S5]{\times}[D13{\times}S1]$ exhibit uniformity in size with a standard deviation of < 8. Overall data indicated the superiority of $[D7{\times}S5]{\times}[D13{\times}S1]$ compared to the other hybrids evaluated and it has profound influence in expressing the full potentiality in the field.

• 한국잠사곤충학회지
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• 제25권2호
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• pp.37-43
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• 1984

누에병 중에 피해가 막대한 전염성 연화병을 방제하기 위하여 바이러스 증식을 특이적으로 억제하는 guanidine 유도체중에서 그 억제효과가 큰 guanidine hydrochloride(GH)를 도입하여 전염성 연화병 바이러스의 증식억제효과에 관하여 조사하였다. 1. 누에에 대한 GH의 약해시험 결과에서는 GH농도 0.01% 수준 이하에서는 약해가 전혀 없었다. 2. FV 감염잠 혼입에 따른 피해조사에서는 화용비율은 무처리(대조) 89.2% (100)에 대하여 1% 감염잠혼입구 70.7%(79), 5% 감염잠 혼입구 38.4%(43)이었으며 1만두수견양은 대조구 21.3kg(100)에 대하여 1% 혼입구 16.7kg(77), 5% 혼입구 8.8kg(41)으로서 전자와 같은 경향으로 나타났다. 3. FV에 대한 GH의 발병억제효과는 GH 0.01% 농도에서 대조구에 비하여 약 10배의 억제효과가 있었다. 4. GH의 투여회수와 발병억제효과에서는 FV접종후 계속 투여하는 것이 가장 효과적이었다. 5. FV 접종후 GH투여시간에 대한 발병억제 효과는 접종과 동시에 투여는 것이 가장 효과적이었다. 6. FV의 GH에 의한 시험관내 불활화조사에서는 GH가 시험관내에서 FV를 불활화시키는 작용이 인정되지 않았다.