Breeding of Hansaengjam a Parental Sex-limited Larval Marking Strain Suitable for Spring Rearing Season

Kang, Pil-Don; Sung, Gyoo-Byung; Kim, Kee‐Young; Lee, Hee-Sam; Kim, Mi‐Ja; Ji, Sang-Duk; Hong, In-Pyo; Kweon, HaeYong; Park, Kwang-Young; Lee, Kwang-Gil; Sohn, Bong-Hee

doi:10.7852/ijie.2011.23.1.179

Cited by 10 publications

(18 citation statements)

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“…Size of spring cocoon is larger than that of autumn cocoon. Authorized silkworm variety, YangWonJam reared in spring 2009, was 2.72 denier (Kang et al, 2011). In general, the filament size range of authorized bivoltine variety in Korea is 2.50-3.00 denier.…”

Section: Resultsmentioning

confidence: 99%

“…Length of spring cocoon is longer than that of autumn cocoon. Authorized silkworm variety, YangWonJam reared in spring 2009, spun 1622 m (Kang et al, 2011). The filament length of authorized general silkworm variety is longer than that of GoldenSilk strain for special use.…”

Section: Resultsmentioning

confidence: 99%

“…In Korea, the government authorizes general healthy stains for farm rearing. Raw silk percentage of YangWonJam, one of current authorized silkworm strain, shows 20.81% (Kang et al, 2011). Park and Lee (1976) reported that cocoon beds have an influence on the percentage of raw silk and rotary cocoon bed was the best one.…”

Section: Resultsmentioning

confidence: 99%

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Cocoon Filament Quality of a Special Silkworm Variety, GoldenSilk

Kweon¹,

Lee²,

Park³

et al. 2012

International Journal of Industrial Entomology

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The effect of cultivation season on the cocoon filament quality of authorized silkworm variety, GoldenSilk was examined with cocoon filament character, reeling character, and fiber character during 3 years. In cocoon filament character, filament length of spring and autumn cocoon was 979 and 879 m, respectively. Cocoon filament weight of spring and autumn cocoon was 33.1 and 26.5 cg, which is lower than that of general bivoltine strain, BaeGokJam. Raw silk percentage of spring and autumn cocoon was 15.65 and 13.77%, respectively. In reeling character, reelability showed similar trend regardless of cultivation season and strain. However, the length and weight of non-broken filament of spring season were slightly higher than those of autumn cocoon. Cultivation season did not affect on the fiber characteristics such as clearness and neatness, lousiness, and degumming loss. In cocoon character, filament length, size, and weight, spring cocoon filament showed higher value than autumn cocoon, but lower than authorized general silkworm varieties. In reeling characteristics, non-broken length and weight showed the similar trends with the cocoon filament character. However, the reelability of GoldenSilk cocoon was not affected by cultivation season. The reelability of GoldenSilk cocoon was also similar with that of authorized general one. Fiber character including clearness and neatness, lousiness, and degumming loss was also similar regardless of the rearing season and different strain.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Cocoon Filament Quality of a Special Silkworm Variety, GoldenSilk

Kweon¹,

Lee²,

Park³

et al. 2012

International Journal of Industrial Entomology

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“…The Japanese race pure line Jam 311 (breeding line JS 169) was crossed between stock lines of Jam125, and Kyunsakjuk and Huka in 2002, and the Chinese pure line Jam 312 (breeding line CS 186) was crossed between stock lines of Jam 304 and Goechuk in 2003. Yangwonjam is an F1 hybrid between the Japanese race Jam 144 and the Chinese race Jam in 1999 (Kang et al, 2000). The Japanese race pure line Jam 144 (breeding line JS 129) was crossed between stock lines of P 8503 and H5R1 in 1993, and the Chinese pure line Jam 144 (breeding line CS 98) was crossed between stock lines of M 8312 and 8190 in 1984.…”

Section: Host Insectmentioning

confidence: 99%

“…These demands have forced the development of the new silkworm varieties suitable for special purposes. Recently new silkworm varieties have been bred for these purposes in Korea: Yangwonjam with a sex-limited larval marking for mass production of male pupae (Kang et al, 2000), Hachojam with non-cocooning silkworm variety for synnemata production of Cordyceps mushrooms (Kang et al, 2002), Golden Silk making yellow color cocoon (Kang et al, 2007), and Eolrukmal and Hukpyobeom with peculiar marks in larval stage for an education and experience (Kang et al, 2010a) were bred, respectively.…”

Section: Introductionmentioning

confidence: 99%

Synnemata Production by Isaria tenuipes using Colored Cocoon Silkworm, Golden Silk

Hong¹,

Kang²,

Kim³

et al. 2011

International Journal of Industrial Entomology

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This study was conducted to test the use of colored cocoon silkworm, Golden Silk, as a host for the fruiting body production of Cordyceps mushroom. Golden Silk variety had a shorter larval period than Yangwonjam at 25.3 o C and 78.5% RH: The average larval period of the Golden Silk was 24 days and 7 hr, and that of the Yangwonjam was 24 days and 15 hr. In the infection test of I. tenuipes on silkworm, the larval period of normal silkworms was longer than the silkworms inoculated with I. tenuipes in both Golden Silk and Yangwonjam. The pupae survival percentage of Golden Silk was 94.4%, whereas it was 91.9% in Yangwonjam. Golden Silk had a higher pupation rate than Yangwonjam. The pupation rate of normal silkworms was about 5% higher than that of silkworms inoculated with I. tenuipes. Infection rate of I. tenuipes into larvae of 5th instar newly exuviated silkworm was 93.8% in Golden Silk, and 96.9% in Yangwonjam. Synnemata production of I. tenuipes was better in Yangwonjam with an incidence rate of 99.8% than Golden Silk with 98.6%. The average synnemata weight of Golden Silk was 1.12 g and that of Yangwonjam 1.29 g. Golden Silk had a lower synnemata weight than Yangwonjam. But no significant difference was observed in synnemata weight varieties. The synnemata of I. tenuipes produced on pupae were white or milky-white in color, and similar in shape and color to wild synnemata collected in Korea.

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Molecular diagnosis of 5 silkworm strains endemic to South Korea using single-nucleotide polymorphisms selected from whole-genome sequences

Park,

Kim,

Park

et al. 2023

Journal of Insect Science

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The domesticated silkworm, Bombyx mori Linnaeus (Lepidoptera: Bombycidae), often poses a challenge in strain identification due to similarities in morphology and genetic background. In South Korea, around 40 silkworm strains are classified as premium, including 5 endemic tri-molting strains: Goryeosammyeon, Sammyeonhonghoeback, Hansammyeon, Sun7ho, and Sandongsammyeon. These strains have potential for breeding programs in response to emerging industry demands, necessitating a reliable strain identification method. In this study, we established a molecular diagnosis approach for these 5 strains. We selected 2–4 single-nucleotide polymorphisms (SNPs) for each strain from whole-genome sequences of 39 strains, encompassing 37 previously studied and 2 newly added. These SNPs were utilized to construct decision trees for each endemic strain identification. The SNPs can be used to distinguish each target strain from the 38 nontarget strains by the tetra-primer amplification refractory mutation system-polymerase chain reaction, with the exception of HMS which needs the addition of PCR-restriction fragment length polymorphism method at the final step. This decision tree-based method using genomic SNPs, coupled with the 2 typing methods, produced consistent and accurate results, providing 100% accuracy. Additionally, the significant number of remaining SNPs identified in this study could be valuable for future diagnosis of the other strains.

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Breeding of Hansaengjam a Parental Sex-limited Larval Marking Strain Suitable for Spring Rearing Season

Abstract: Normally the first generation of hybrid is supplied for farm rearing, precise and labor saving sex discrimination is needed. The new strain "Hansaengjam" is sex-limited ( :larval markings, :no-markings) strain which was bred from both sex-limited strain Japanese

Cited by 10 publications

References 0 publications

Cocoon Filament Quality of a Special Silkworm Variety, GoldenSilk

Cocoon Filament Quality of a Special Silkworm Variety, GoldenSilk

Synnemata Production by Isaria tenuipes using Colored Cocoon Silkworm, Golden Silk

Molecular diagnosis of 5 silkworm strains endemic to South Korea using single-nucleotide polymorphisms selected from whole-genome sequences

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