Viduya, Marlyn M.Ulat, Maricris E.Supsup, Gemma E.Abuan, Julieta P.Sanchez, Edgar P.Supsup, Roel D.2025-12-042025-12-042023-09-30Viduya, M. M., Ulat, M. E., Supsup, G. E., Abuan, J. P., Sanchez, E. P., & Supsup, R. D. (2023). Multivoltine and bivoltine silkworm F₁ hybrids adaptable to type one (1) climatic conditions in the Philippines. International Journal of Industrial Entomology and Biomaterials, 47(1) 34-43. https://koreascience.kr/article/JAKO202329264997261.pdf1598-3579e 2586-4785http://dx.doi.org/10.7852/ijie.2023.47.1.34https://lakasa.dmmmsu.edu.ph/handle/123456789/683The 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.enSericultureSilkworm hybridsMultivoltine silkwormBivoltine silkwormClimate adaptabilityAgricultural biotechnologyPhilippinesSericultureSericultureSilkworms--BreedingSilkworms--HybridsSilkworms--AdaptationClimatic changes--Agricultural aspects--PhilippinesAgricultural biotechnologyArticle