Breeding of a Silkworm Variety for Synnemata Production of<i>Isaria tenuipes</i>

Kang, Pil Don; Sung, Gyoo Byung; Kim, Kee Young; Kim, Mi Ja; Hong, In Pyo; Ha, Nam Gyu

doi:10.4489/myco.2010.38.3.180

Cited by 7 publications

(8 citation statements)

References 3 publications

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“…But, some of the silkworms died within the cocoon or missed from the cocoon frame during the rearing period for various reasons. Normal silkworms had a higher pupation rate than the silkworms inoculated with I. tenuipes , in agreement with a previous study that used a different silkworm variety [ 10 ].…”

Section: Resultssupporting

confidence: 92%

“…There were no significant differences in the pupation rate ( p < 0.05) between male Yangwonjam and Baegokjam. Female Yangwonjam showed a higher survival percentage than the 66.9% value for Hachojam silkworm reported previously [ 10 ].…”

Section: Resultsmentioning

confidence: 53%

“…In the autumn rearing season, infection rates were 98.2% (n = 1,414) in female Yangwonjam, 99.3% (n = 1,370) in male Yangwonjam, and 98.3% (n = 1,391) in Baegokjam ( Table 4 ). Female Yangwonjam showed an equal infection rate with the Hachojam silkworm variety (99.8%) [ 10 ].…”

Section: Resultsmentioning

confidence: 99%

“…In this study, female Yangwonjam was selected as a new host of I. tenuipes for synenemata production following Hachojam reported by Kang et al [ 10 ]. In particular, female Yangwonjam showed high pupation rate and heavier pupa weight, which should produce labor savings.…”

Section: Resultsmentioning

confidence: 99%

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Synnemata Production Using Silkworm Variety, Female Yangwonjam by Isaria tenuipes

Sung

Kang

et al. 2011

Mycobiology

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This study was conducted to confirm the possible use of female Yangwonjam as a host for synnemata production of Isaria tenuipes in eight local areas in Korea. Silkworm pupation rate, infection rate and synnemata characteristics of I. tenuipes were examined. Normal silkworms had a higher pupation rate than silkworms inoculated with I. tenuipes. The pupae survival percentage of normal silkworm in cocoons was 92.5~97.6%, whereas it ranged from 91.1~95.6% in silkworms sprayed with I. tenuipes. Female Yangwonjam showed the highest survival percentage at 97.6% among the silkworm varieties tested. I. tenuipes infection rate of larvae of 5th instar newly-exuviated silkworms was 89.2~90.7% in the spring rearing season and 98.2~99.3% in the autumn rearing season. Synnemata production of I. tenuipes was excellent in female Yangwonjam with an incidence rate of 98.0% followed by male Yangwonjam (94.1%) and Baegokjam (93.3%) in the spring rearing season. Synnemata living weight ranged from 1.44~0.94 g in the spring rearing season. The female Yangwonjam had the heaviest synnemata weight (1.44 g) in the spring rearing season. The synnemata of I. tenuipes produced on pupae were white or milky-white in color, and were similar in shape and color to wild synnemata collected in Korea.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 53%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Synnemata Production Using Silkworm Variety, Female Yangwonjam by Isaria tenuipes

Sung

Kang

et al. 2011

Mycobiology

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“…It was assumed that the developmental period was shortened because of the physiological changes in the silkworm from the fungi inoculation (Yun, 2005). Our results agree that Hachojam inoculated with I. tenuipes had a shorter larval period than normal silkworms (Kang et al, 2010b), though using different silkworm variety.…”

Section: Larval Periodsupporting

confidence: 86%

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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Improvement of nucleotide content of Cordyceps tenuipes by Schisandra chinensis: fermentation process optimization and application prospects

Li,

Zhu,

et al. 2024

Arch Microbiol

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Nucleotides are important components and the main indicators for judging Cordyceps quality. To increase the nucleoside content of Cordyceps tenuipes for enhancing the efficacy activity. In this paper, the mixed fermentation process of Schisandra chinensis and C. tenuipes was systematically studied, and it was proposed that the fermentation products aqueous extract (S-ZAE) had antioxidant activity and anti-AChE ability. Herein, the results of a single factor showed that S. chinensis, yeast extract, inoculum amount, and pH had significant effects on nucleotide synthesis, and these four factors were used as the factor of response surface optimization. The results of response surface optimization were 3% glucose, 0.25% KH2PO4, 2.1% yeast extract, and S. chinensis 0.49% (m/v), the optimal fermentation conditions were 25℃, inoculum 5.8% (v/v), pH 3.8, 6 d. The yield of total nucleotides in the scale-up culture was 0.64 ± 0.027 mg/mL, which was 10.67 times that before optimization, and S-ZAE has good antioxidant and anti-AChE activities. This fermentation method has the advantage of industrialization, and its fermentation products have the potential to become good functional foods or natural therapeutic agents.

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Breeding of a Silkworm Variety for Synnemata Production ofIsaria tenuipes

Cited by 7 publications

References 3 publications

Synnemata Production Using Silkworm Variety, Female Yangwonjam by Isaria tenuipes

Synnemata Production Using Silkworm Variety, Female Yangwonjam by Isaria tenuipes

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

Improvement of nucleotide content of Cordyceps tenuipes by Schisandra chinensis: fermentation process optimization and application prospects

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