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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Sericultural and Entomological Science
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Journal DOI :
Korean Society of Sericultural Science
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Volume & Issues
Volume 36, Issue 2 - Dec 1994
Volume 36, Issue 1 - Jun 1994
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Cold-hardiness Tetraploid Induced by Colchicine Treatment in Mulberry Seedings(Morus alba L. Yongchonppong/Kaeryanppong)
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 1~7
Four tetraploid mulberry lines, Sawonppon No.11, No.13 and No.14, were induced by the colchicine treatment on the shoot tips of seedlings originated from the cross between Yongchonppong and Kaeryanppong. The major characteristics of the tetraploid lines were as follows: Green tip sprouting stage was similar to Kaeryanppong, a medium budding variety. Leaves were medium- to large-sized cordate type. Leaf surface was rougher and stronger than that of the diploid parents. Leaf thickness, leaf area weight and leaf water content were higher than those of the diploid parents. Average branch length was shorter than that of the diploid parents. Internode length and number of lateral branches were similar to the average values of the two parents. Death atop rate of branch was 1.6%~2.5% indicating strong cold-hardiness of the tetraploid lines. Therefore, these lines could be used as sources of cold-hardiness in developing triploid lines.
The Test of Combining Ability and Heterosis on the Silkworm(Bombyx mori) Breeding
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 8~25
The study was conducted to obtain the genetic information on heterosis and combining ability of the quantitative characters for F1 hybrid breeding in silkworms. Six parental varieties and each set of 30 diallel crosses in F1's were used as materials, and bred on the randomized complete block design with three replications. Fourteen characters were observed with the twenty samples in each tray. The data were analyzed for (1) heterosis and combining ability in F1 hybrid. The heterosis in the weight and the length of cocoon showed positively high at 24.51%, and 23.4%, respectively and the weight of the whole cocoon as well as the weight of the whole cocoon layer showed a siginificant heterosis ranging from 15.56% to 15.71% and from 17.14% to 19.01%, but the fifth and the total instar period showed negative heterosis. It was found that the combination between, C70XRomogua and N9 X Romogua showed highly a negative heterosis on the fifth instar period and for the cocoon weight. The female of N9+Sansuian and the male of Romogua X Sansurian have a high heterosis effect, on the cocoon shell weight, and Sansurian X Romogua(reciprocal) on the length and the weight of cocoon filament with no regard to sexuality. The significant maternal and cytoplasmic effect on heterosis of the cocoon weight and the cocoon shell weight were observed with the combinations, N9 X C5, N63 X C70 and on the length of the cocoon filament with the combinations, Sansurian X N63, Sansurian X C5, Sansurian X C70 and N9 X C70, N63 X C70 on the weight of cocoon filament. As mean squared of GCA, SCA and RCA were significant with these combining ability for all characters resulted from additive and non-additive altogether and there is a significant difference between reciprocals. Sansurian showed a negative GCA effect on the fifth and total larval duration, but the higher positive GCA effects took places with varieties N9 and C5 on the length, width, weight of cocoon, cocoon shell weight, percentage of cocoon shell weight, length and weight of cocoon filament, percentage of raw-silk with no regard to both generations and silkworm sexuality. The values of SCA between the cross combinations varied generation-wise and sex-wise. It was shown that SCA value for the fifth instar period was highly negative for Sansurian X C70, Romogua X C70, Sansurian X C5, Romogua X C5, but it was positive effect on the cocoon weight, cocoon shell weight with N9 X C5, and C70 X Sansurian, on the length of cocoon filament with N9 X C5, Romogua X Sansurian on the weight of cocoon filament between Romogua and N63 and on the percentage of raw-silk between the combination of Sansurian X Romoga.
Application of Methoprene Followed by Insulin in the Pure Mysore Breed of the Silkworm Bombyx Mori
Magadum, S.B. ; Hooli, M.A. ; Magadum, V.B. ;
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 26~29
The topical application of methoprene a kind of juvenile hormone(JH) on 4th instar larvae at 48th hour after ecdysis-3 , followed by insulin on 5th instar larvae and silkgland weights, cocoon weight and cocoon shell weight, and fecundity ; and significantly decreases percent of cocooning and moth emergence. After treatment with methoprene followed by insulin, cocoon weight increase by 17~20% and cocoon shell weights by 18~32% respectively.
Morphological and Biochemical Characterization of the Chorion in Interspecific Hybrid Between Bombyx mori and Bombyx mandarina
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 30~36
choChorion(egg-shell) morphology of the F1 hybrid between Bombyx mori and Bombyx mandarina has been observed by scanning electrom microscope and chorion protein was analyzed by electrophoresis. The chorion surface structure of F1 hybrids in the lateral(flat) region was similar to that of maternal line. The F1 hybrids chorion was found to have basically a three layer structure. The middle and inner layer were very much like those of the Bombyx mandarina and Bombyx mori. There were many conic pillar structures in the outer layer of the F1 hybrid, which was similar to Bombyx mandarina. This conic pillar structure had a thin cover layer was more clear in the dorsal and ventral side of the F1 hybrid chorion. The conic pillar structure of Bombyx mandarina was found to be dominant in F1 hybrid chorion irrespective of their maternal line. Major components of chorion protein were analyzed by two-dimensional electrophoresis and found to have isoelectric points in the range of pH 4.0-6.5 and molecular weight 10 to 50 kd. F1 hybrid chorion protein components related directly to those of the maternal line. The conic pillar structure was dominat characteristic and it was present in all F1 hybrid.
Effects of Some Sodium Phosphates as Auxiliary Agents for Softening Hard Water to Degum Silk
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 37~43
The effects of some sodium phosphates as auxiliary agents were studied on the blockade of hardness for silk degumming. In this work, four kinds of sodium phosphates were tested and the results were obtained through masking effects of metallic ions, difference of pH value and boil-off ratio. The degumming of calcium ingredient was analyzed by means of atomic absorption spectrophotometer and degumming test of cocoon shell was performed in the presence of calcium ingredient and sodium phosphates added to soap solution. In the view of the effects of sodium phosphates on calcium hardness, tetrasodium pyrophosphate(TSPP) and sodium phosphate dibasic(SPD) masked calcium ions more than sodium phosphate monobasic(SPM) and sodium hexametaphosphate(SHP). SHP and TSPP have excellent abilities of masking ferrous ions. The pH values of TSPP solution is higher than others, but lower than soap solution. The pH values were differently measured one another among the sodium phosphates but the boil-off ratio was increased in case of sodium phosphate with high pH value.
DEGUMMING OF SILK FABRIC WITH AN ENZYME DEGUMMASE
Chopra, Sheetal ; Garg, Samir ; Gulrajani, M.L. ;
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 44~52
Degumming with enzyme Degummase can be a viable alternative to the existing methods of degumming. Degumming, carried out with the conventional method of Marseille's soap 25%(owf) for 1.5h at boil gives a weight loss of about 24%. On Comparison, degumming with 10 enzyme at 5
for 60 min gives a weight loss of about 22%. Treatment with enzyme requires a much lower temperature and also the treatment time is shorter than the conventional process. Processing of silk at these conditions is likely to retain the lustre and softness of silk. To economise on the quantity of enzyme, conditions were optimised for a pad-store process. An enzyme concentration of 0.5% at 5
for a time period of 5~6h resulted in a weight loss of 22%. Though the concentration of the enzyme used was 20 times less than that used for long liquor method there was some strength loss. At 5
treatments carried out for 7~8 h resulted in some degradation. Strength loss occurs because enzyme in the absence of any stirring keeps acting at the place where it is deposited. Effect of temperature was more pronounced than time in degrading silk.
The Study on the Weight loss Finishing for the mixture Silk/Polyester II. The Weight loss Finishing for the Spun silk/Polyester
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 53~57
The weight loss for the mixture (spun silk/PET) was tested to investigate the effects of weight loss accelerator on the degumming and weight loss. The degumming loss of spun silk was decreased while the wigth loss of polyester(PET) was increased depending on the increased of weight loss accelerator concentration. The proper degumming of spun silk was obtained and simultaneously the weight loss of PET was high for the spun silk/PET "A" and "B" type. The proper degumming of spun silk was obtained but the weight of PET was loss for the spun silk/PET "D" and "E" type. The degumming curve in spun silk part was showed the typical degumming curve but the weight loss of PET was increased depending on the increased of treatment time in the weight loss for the fabric composed of spun silk/PET.or the fabric composed of spun silk/PET.
Physical characteristics of Stocking knitted with Silk/Nylon Compound Yarn
Kim, Yeong-Dae ; Kim, Nam-Jeong ; Song, Gi-Eon ;
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 58~61
This study was carried out to investigate the physical characteristics of stocking knitted with silk/nylon(S/N) compound yarn. In SEM observation, it was found that most part of S/N stocking was well interlaced between silk and nylon yarn. There was no difference between S/N stocking and nylon stocking in shrinkage at warm water and compressive resilience. The suction height and absorbability of S/N stocking was 4~8 times and 3 times higher than that of nylon stocking, respectively. According to the wearing test survey, most of wearers answered that the warmth, the hand and the feeling cool of S/N stocking were better than those of nylon stocking but reversed in elasticity, and they gave sprit opinion on durability responding good impression in total feeling of S/N stocking.
Identification and Bioassay of Nucleation Active Bacteria from Branch Rot of Mulberry and Their Population
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 62~68
Isolation, indentification, bioassay and distribution of ice nucleation active(INA) bacteria were done on branch rot of mulberry which was severely developed after harvest of mulberry branches in autumn. Twelve isolates and two isolates out of thirty-six isolates had ice nucleation activity from -5
, and over -5
, respercively. Isolates which formed ice nucleation from -5
were not inclined to injure tomato and corn seedlings. However, Two isolates, SE9316 and SE9338 which formed ice nucleation over -5
injured mulberry, tomato and corn seedlings. SE9316 and SE9338 were identified as Pseudomonas syringae based on the morphological, cultural and biochemical characteristics. Populations of ice nucleation active bacteria, fluorecent pseudomonads, were higer in February and April, but they decreased in May. Populations decreased as they become distant from the center of the symptom. The bacterial populations of all sampling times and sites were higer than 105 cfu/g which was enough to induce frost injury.
Transovarial Transmissibility and Histopathology on the Gonad Ivfection with Nosema bombycis in the Silkworm, Bombyx mori,
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 69~75
Through the histological and anatomical investigation of silkworm gonad, N. bombycis infection was found to begin from the peripheral region of ovarial sheath or testicular sheath, then, the pathogens spread to the inner portion. Peroral inoculation with purified spores of N. bombycis to 2nd instar larvae at dosages around 106-8/㎤ of artificial diet resulted in the extremely extended larval survival as long as 15 to 22 days of 4th instar. The growth of ovarioles was confirmed in the 10 to 14 day old larvae, oogonia developed into oocytes and nurse cell against heavy infection of the ovary. Gonads rarely obstructed oogenesis and spermatogenesis in the pupae failed in adult eclosion. Light infection of female hosts effected insignificantly on the ovarial development, however, recorded 100% transmission of the pathogens to the progeny populations. Conclusively, ovarial inflection of silkworm induce transovarial transmission begins around 2~3 day old pupae when ovarioles extruded out to hemocoel, and the infection period thought to be continued until the stage of eggs complete shell formation in the ovariole.
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 76~80
한국전통염직물의 시대별 고찰
Journal of Sericultural and Entomological Science, volume 36, issue 1, 1994, Pages 81~89