International Journal of Industrial Entomology and Biomaterials

Korean Society of Sericultural Science (한국잠사학회)
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Multivoltine and Bivoltine Silkworm F1 Hybrids Adaptable to Type One (1) Climatic Conditions in the Philippines

  • Marlyn M. Viduya (Don Mariano Marcos Memorial State University) ;
  • Maricris E. Ulat (Don Mariano Marcos Memorial State University) ;
  • Gemma E. Supsup (Don Mariano Marcos Memorial State University) ;
  • Julieta P. Abuan (Don Mariano Marcos Memorial State University) ;
  • Edgar P. Sanchez (Don Mariano Marcos Memorial State University) ;
  • Roel D. Supsup (Don Mariano Marcos Memorial State University)
  • Received : 2023.03.29
  • Accepted : 2023.09.21
  • Published : 2023.09.30
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Abstract

The eighteen (18) F1 hybrid combinations were tested to identify potential combinations adaptable to type 1 climatic conditions in the Philippines. The six (6) bivoltine purelines (DMMMSU 108, DMMMSU 109, DMMMSU 110, DMMMSU 111, DMMMSU 113, and DMMMSU 119); and three (3) multivoltine purelines (DMMMSU 1000, DMMMSU 1007, and DMMMSU 1014), were crossed (multivoltine x bivoltine) in a mating plan. These were arranged in a Completely Randomized Design (CRD), replicated three times, and analyzed using Analysis of Variance (ANOVA). A test of significance was done using ANOVA across years and Tukey's Honest Significant Difference Test (HSD). The multiple trait evaluation index (EI) method was also used in the identification of potential F1 hybrids. Three major phases were done: (1) parental rearing of multivoltine and bivoltine pure lines for breed multiplication; (2) hybridization process; and (3) evaluation of F1 hybrids. Rearing evaluations were conducted for three consecutive years. Based from the three evaluations, 10 potential crosses were identified: DMMMSU MV-12, DMMMSU MV-11, DMMMSU MV-13, DMMMSU MV-16, DMMMSU MV-07, DMMMSU MV-14, DMMMSU MV-05, DMMMSU MV-09, DMMMSU MV-03, and DMMSU MV-10. The topmost combinations with the best economic and commercial characters and are consistently adaptable during two (2) cropping seasons were DMMMSU MV-07, DMMMSU MV-12, DMMMSU MV-05, DMMMSU MV-09 and DMMMSU MV-11. These newly-identified F1 hybrids are considered potential breeds that could improve cocoon production.

Keywords

Acknowledgement

The Authors are ever grateful to Ms. Evangel M. Barrameda, Officer-In-Charge, Office of the Chief of Research and Development Division, for her valuable insights, suggestions, and assistance in the conduct and completion of this endeavor. Likewise, credit is due to the research assistant of the Silkworm Breeding and Improvement Unit. Utmost recognition is addressed to the Don Mariano Marcos Memorial State University for the financial support extended to this humble work.

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