Browsing by Author "Supsup, Roel D."

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Multivoltine and bivoltine silkworm F₁ hybrids adaptable to type one (1) climatic conditions in the Philippines
    (The Korean Society of Sericultural Sciences International Journal of Industrial Entomology and Biomaterials, 2023-09-30) Viduya, Marlyn M.; Ulat, Maricris E.; Supsup, Gemma E.; Abuan, Julieta P.; Sanchez, Edgar P.; Supsup, Roel D.
    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.
  • Thumbnail Image
    Item
    On-station yield trial evaluation of promising silkworm hybrids in the Philippines
    (International Journal of Biosciences, 2024-10-06) Supsup, Gemma E.; Abuan, Julieta P.; Ulat, Maricris E.; Viduya, Marlyn M.; Sanchez, Marybel L.; Supsup, Roel D.
    On-station silkworm rearing trials were done in three distinct seasons (January-February, April-May, and July-August) at the Sericulture Research and Development Institute in Bacnotan, La Union, Philippines to evaluate the cocoon yield and quality of the five (5) newly-developed bivoltine silkworm hybrids (DMMMSU 108 x DMMMSU 119, DMMMSU 110 x DMMMSU 113, DMMMSU 110 x DMMMSU 119, DMMMSU 119 x DMMMSU 110), and DMMMSU 119 x DMMMSU 108). These were compared to the local single cross bivoltine hybrid, DMMMSU 222in terms of cocoon characteristics such as cocoon yield, effective rearing rate, single cocoon weight, and cocoon shell percentage. The data gathered were statistically analyzed using the Analysis of Variance (ANOVA) in Completely Randomized Design (CRD). Tukey’s Honest Significant Difference (HSD) was used to test the significance among all the hybrids and against the control hybrid. The results revealed variations in the performance of the different hybrids on cocoon characters and in different rearing seasons. Among the five new hybrids, DMMMSU 119 x DMMMSU 108 consistently performed better than the controlin terms of effective rearing rate (ERR) and cocoon yield per box (CYPB), particularly in the July–August and January–February seasons. DMMMSU 108 x DMMMSU 119 also performed better over the control hybrid when reared in the April to May and July to August rearing seasons. DMMMSU 110 x DMMMSU 119 performed betterthan the control hybrid during the January to February rearing season. Overall, these hybrids are recommended for further trials in the farmer’s field for validation.