Vol. 102, No. 4 (Dec 2019)
Carica papaya is one of the most economically important fruit crops in the Philippines. Its production has been affected by a disease caused by Papaya ringspot virus (PRSV) and the development of new hybrid varieties is one approach to circumvent this problem. Three new F1 hybrids that are moderately tolerant to PRSV were developed by the Papaya Breeding team of the Institute of Plant Breeding, College of Agriculture and Food Science, University of the Philippines Los Baños. The parents of the hybrids were PRSV-tolerant. They also possess desirable characteristics. These new F1 hybrids were tested in a few locations in Southern Tagalog. In addition to moderate reaction to PRSV, ‘Hirang’ (Hybrid 097 x 4172), ‘Liyag’ (Hybrid 5648 x 336), and ‘Timyas’ (Hybrid 4173 x 5648) are prolific bearers of fruits which are sweet and firm, and have juicy flesh. ‘Hirang’ has red-orange flesh while ‘Liyag’ and ‘Timyas’ have yellow to yellow orange flesh. The trees are semi-dwarf and have a thick stem.
Categories
Articles
Effects of Moringa oleifera Leaf Meal on Plasma Ghrelin and Insulin-like Growth Factor-1 Levels in Swine and its Potential Role in Improving Sow Productivity
Rainier Kent Emerson B. Gonzales, Izza Rona Abina-Artuz, Christine B. Adiova, Antonio A. Rayos and Renato SA. Vega
Two experiments were conducted to determine the possible role of Moringa oleifera on sow productivity and ghrelin – growth hormone (GH)/insulin-like growth factor-1 (IGF-1) metabolic pathway. In the first experiment, the effects of 15% M. oleifera leaf meal (MoLM) inclusion in the diet on the plasma ghrelin and IGF-1 levels were determined using four sexually mature gilts with indwelling catheter. Results showed that plasma ghrelin and IGF-1 levels between the control and experimental groups were not statistically different, although pigs fed with MoLM had apparently lower baseline and higher amplitude of plasma ghrelin levels particularly a few hours right after feeding time. On the othe...
Two experiments were conducted to determine the possible role of Moringa oleifera on sow productivity and ghrelin – growth hormone (GH)/insulin-like growth factor-1 (IGF-1) metabolic pathway. In the first experiment, the effects of 15% M. oleifera leaf meal (MoLM) inclusion in the diet on the plasma ghrelin and IGF-1 levels were determined using four sexually mature gilts with indwelling catheter. Results showed that plasma ghrelin and IGF-1 levels between the control and experimental groups ...
Genotype Differences in Seed Germination and Growth, Pollen Fertility and Fruit Traits of Three Promising Papaya (Carica papaya L.) F1 Hybrids
Pablito M. Magdalita and Alangelico O. San Pascual
Papaya F1 hybrids are generally grown by many growers for their hybrid vigor, superior fruit characteristics and moderate tolerance to the Papaya ringspot virus (PRSV). A single-factor experiment conducted in completely randomized design (CRD) with three replications was done to test seed germination, assess seedling growth, and evaluate pollen fertility and horticultural characteristics of three promising papaya F1 hybrids – 5 648 x 336 (Liyag), 097 x 4 172 (Hirang), and 4 173 x 5 648 (Timyas). There were significant differences in percent seed germination and seedling height between the three papaya F1 hybrids. Hybrid 5 648 x 336 (Liyag) had the highest seed germination rate (92.20%) an...
Papaya F1 hybrids are generally grown by many growers for their hybrid vigor, superior fruit characteristics and moderate tolerance to the Papaya ringspot virus (PRSV). A single-factor experiment conducted in completely randomized design (CRD) with three replications was done to test seed germination, assess seedling growth, and evaluate pollen fertility and horticultural characteristics of three promising papaya F1 hybrids – 5 648 x 336 (Liyag), 097 x 4 172 (Hirang), and 4 173 x 5 648 (Timya...
SSR Markers for Fingerprinting, Hybridity Testing and Diversity Analysis of Important Varieties and Promising Lines of Papaya in the Philippines
Kharen C. Cimagala, Maribel M. Zaporteza, Arnelyn C. Doloiras-Laraño, Roberta N. Garcia and Evelyn Mae Tecson-Mendoza
Simple sequence repeat (SSR) or microsatellite markers were identified for Philippine varieties of papaya for varietal identification, diversity analysis, and hybridity assessment. Fourteen SSR markers were screened using PCR for amplification and polymorphism. Six primer combinations namely, CPMET, BGAL, ACC, CPY, SSR 12 and SSR 35, were effective in fingerprinting and diversity analysis and for hybridity testing, except for CPMET. The genetic relationship of the selected papaya varieties was established based on UPGMA clustering. At 0.76 coefficient of similarity, three groups were observed, namely: Group I (Davao Solo, Maradol and Red Lady), Group II (Sinta and Cavite Special) and Grou...
Simple sequence repeat (SSR) or microsatellite markers were identified for Philippine varieties of papaya for varietal identification, diversity analysis, and hybridity assessment. Fourteen SSR markers were screened using PCR for amplification and polymorphism. Six primer combinations namely, CPMET, BGAL, ACC, CPY, SSR 12 and SSR 35, were effective in fingerprinting and diversity analysis and for hybridity testing, except for CPMET. The genetic relationship of the selected papaya varieties wa...
Antioxidant Enzyme Activities and Dry Matter of Rice Plant as Affected by Interactions of Lead, Phosphorus and Zinc
S. Mardomi, N. Najafi, R. Reyhanitabar and G. Dehgan
Nutrient management can be an effective approach to enhance plant antioxidant defense system under heavy metal toxicity. A greenhouse experiment was conducted to examine the effects of the two- and three-way interactions of lead (Pb), zinc (Zn) and phosphorus (P) on the activity of catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) enzymes and the total dry matter (TDM) of rice (Oryza sativa L. cv. Hashemi). This study was conducted as a factorial experiment in completely randomized design with three factors of Zn (0, 25 and 250 mg kg−1), P (0, 50 and 500 mg kg−1) and Pb (0, 200, 400 and 800 mg kg−1) and three replications in calcareous soil. CAT, POD and SOD activity in the ...
Nutrient management can be an effective approach to enhance plant antioxidant defense system under heavy metal toxicity. A greenhouse experiment was conducted to examine the effects of the two- and three-way interactions of lead (Pb), zinc (Zn) and phosphorus (P) on the activity of catalase (CAT), peroxidase (POD) and superoxide dismutase (SOD) enzymes and the total dry matter (TDM) of rice (Oryza sativa L. cv. Hashemi). This study was conducted as a factorial experiment in completely randomi...
Effects of Hot Air and Vacuum Drying Methods on Drying Kinetics and Some Quality Characteristics of Traditionally Produced Couscous in Turkey
Soner Çelen and Türkan Aktaş
Drying kinetics and changes in some quality properties of couscous were studied to determine optimal drying method and drying temperature. Drying methods using hot air drying (HAD) and vacuum drying (VD) were applied and couscous samples were dried as thin layer at 55, 65 and 75 °C. Pressure was set at 0.98 bar for vacuum drying. Quality parameters of color values (L*, a*, b*, chroma) and water activity values were measured. Drying periods for VD and HAD at 65 °C were found to be similar. Lower color deviation (ΔE) and water activity values were also determined for vacuum-dried samples. The Midilli et al. model was found to be the most appropriate thin layer model for both HAD and VD meth...
Drying kinetics and changes in some quality properties of couscous were studied to determine optimal drying method and drying temperature. Drying methods using hot air drying (HAD) and vacuum drying (VD) were applied and couscous samples were dried as thin layer at 55, 65 and 75 °C. Pressure was set at 0.98 bar for vacuum drying. Quality parameters of color values (L*, a*, b*, chroma) and water activity values were measured. Drying periods for VD and HAD at 65 °C were found to be similar. Low...
