Journal of Sericultural and Entomological Science (한국잠사곤충학회지)

Korean Society of Sericultural Science (한국잠사학회)
권호 표지
DOI QR코드

DOI QR Code

Comparison of F1 and F2 hybrid on authorized silkworm variety

누에 장려품종간 교잡누에의 실용형질 비교

  • Kim, Kee-Young (Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Mi-Ja (Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Ji, Sang-Duk (Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Nam-Suk (Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Yong-Soon (Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Sung, Gyoo-Byung (Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Park, Kwang-Young (Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kang, Pil-Don (Department of Agricultural Biology, National Academy of Agricultural Science, Rural Development Administration)
  • 김기영 (농촌진흥청 국립농업과학원 농업생물부) ;
  • 김미자 (농촌진흥청 국립농업과학원 농업생물부) ;
  • 지상덕 (농촌진흥청 국립농업과학원 농업생물부) ;
  • 김남숙 (농촌진흥청 국립농업과학원 농업생물부) ;
  • 김용순 (농촌진흥청 국립농업과학원 농업생물부) ;
  • 성규병 (농촌진흥청 국립농업과학원 농업생물부) ;
  • 박광영 (농촌진흥청 국립농업과학원 농업생물부) ;
  • 강필돈 (농촌진흥청 국립농업과학원 농업생물부)
  • Received : 2015.04.20
  • Accepted : 2015.04.29
  • Published : 2015.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

This study was conducted to consider practical use of F2 hybrid and intervariety crossing for the improvement of silkworm eggs export and silkworm eggs manufacture. Now Kumokjam and Baegokjam come into wide use to sericulture farmers but comparison test of F1, F2 hybrid and intervariety have not been done. We weighed against the productivity among economical character. While larval period of F2 among them is most long time, pupation percentage and cocoon yield per 10,000 3rd molted larvae are lower than intervariety. With comparing F2 and intervariety, single cocoon weight of F2 is lower 9 ~ 21% than intervariety, and cocoon shell weight of F2 was lower 10 ~ 18% than intervariety. By number of cocoons per liter, F2 hybrid was lower and more irregular size than intervariety. In coparison with number of egg laid, F2 hybrid Baegokjam was 655 ea (14%) and Kumokjam 625 ea (40%) more than F1 hybrid. Also, F2 hybrid for filament grade went down than F1 hybrid. The advantage of egg production in F2 hybrid can reduce costs because there is no necessity for sex discrimination and germination control. But besides increase of number of egg laid, the productivity including economical characters was greatly lowered. Except for being a lot of laying eggs, cocoon productivity of the F2 was greatly reduced by degeneration of practical traits. Therefore the further studies are needed in order to increase utilization value of the F2 hybrid silkworm.

본 시험은 잠종수출 및 잠종제조 능률향상 면에서 교잡종 F2 및 품종간 잡종의 이용을 검토하기 위하여 현재 장려품종으로 보급되고 있는 백옥잠과 금옥잠을 이용하여 교잡종(F1), 2대잡종(F2) 및 품종간 잡종의 실용형질의 생산성을 비교 검토하였다. 1. 전령 사육일수는 F2가 5령 및 전령 모두 길었다. 2. 2세대 잡종(F2)은 교잡종에 비해 화용비율은 2 ~ 13% 정도 낮았고, 1만두 수견량은 16 ~ 21% 낮았다. 3. 전견중에서 2세대 잡종(F2)은 교잡종에 비해 9 ~ 21% 낮았고, 견층중은 10 ~ 18% 낮았다. 4. 고치의 크기를 나타내는 1리터 개수는 2대 잡종은 교잡종에 비해 고치의 크기가 작고 고르지 못한 경향을 나타냈다. 5. 1나방 산란수는 교잡종보다 2대 잡종에서 백옥잠은 14%가 많은 655개, 금옥잠은 40%가 많은 625개 이었다. 6. 견사량, 1만두 생사량 등 사질조사 성적도 교잡종보다 2대 잡종에서 생산성이 많이 떨어지는 경향을 나타냈다. 2대 잡종 잠종 생산시에 유리한 점은 암수감별이나 발아조절이 필요가 없어 잠종생산 노력이나 비용을 많이 절감할 수 있으나, 산란수가 많아지는 외에는 실용형질에서 생산성이 크게 낮아져 2대 잡종 잠종으로 고치를 생산할 경우는 경제성 등을 고려하여 추후 많은 연구가 필요할 것으로 사료된다.

Keywords

References

  1. Hong KW, Ryu KS, Hwang SJ, Shon BH, Kang PD, Seol KY, Lee SP, Kim KM (1996) Breeding of Kumokjam, an artificial diet adaptable silkworm variety, for spring rearing season. Res Rept RDA 38, 801-805.
  2. Jeong WB (1990) Studies on heterosis, selective Index, genetic advance and selective efficiency for some characters in silkworm breeding. Korean J Seric Sci 32, 8-16.
  3. Jeong WB, Chang KY (1989) Degrees of heterosis and inbreeding depression of quantitative chatacters in silkworm by diallel crosses. Korean J Seric Sci 31, 20-24.
  4. Kawabata, Otachi (1982) Comparison test of the F1 and F2 of two or three current varieties and old varieties. Sericulture research 121, 63-75.
  5. Lee SP, Hong KW, Sohn KW, Mah YI, Kim KY (1984) Breeding of new silkworm variety "Baegokjam". Res Rept RDA 26, 58-64.
  6. Moon BW, Han KS (1994) The test of combining ability and heterosis on the silkworm(Bombyx mori) breeding. Korean J Seric Sci 36, 8-25.
  7. RDA (2010) Guideline for sericultural experiment
  8. Shon BH, Jeong WB (1992) Analysis of gene for major quantitative characters in silkworm, Bombyx mori. Korean J Seric Sci 34, 21-29.
  9. Toyama (1906) $^{\circ}{\times}$Studies on the hybridology of insects. I. On some silk-worm crosses, with special reference to Mendel's law of heredity$^{\circ}{\pm}$, Bulletin of College of Agriculture, Tokyo Imperial University 7, 259-393.
  10. Yokoyama T (1973) Studies on the improvement in the efficiency of egg production by means of polyhybridization. Reports of the Silk Science Research Institute 22, 6-35.