Vol. 104, No. 1 (Mar 2021)
Philippine native pigs are commonly found in the backyards of rural households in several regions in the Philippines. They are predominantly black with long face, long snout, short and low-set body conformation, erect ears, small size, with an average mature body weight of 40 kg only (Bondoc and Ramos 1998). With the goal to improve the performance of The Philippine native pigs, the National Swine and Poultry Research and Development Center (NSPRDC) in Tiaong, Quezon developed the Black Tiaong pigs through selective breeding of native pigs from Kalinga, Marinduque and Quezon. Researches are also conducted on the establishment of nutrient requirements of the pigs.
Categories
Articles
Maximum Entropy (MaxEnt) Modeling of the Potential Distribution of Aspidiotus rigidus Reyne (Hemiptera: Diaspididae) in the Philippines
Ireneo B. Pangga, Arnold R. Salvacion, Nikka H. Hamor, and Sheryl A. Yap
Received: 27 February 2020/ Revised: 4 February 2021/ Accepted: 8 February 2021
The coconut scale insect (CSI) Aspidiotus rigidus Reyne (Hemiptera: Diaspididae) poses a significant threat to coconut production in the Philippines as shown by recent outbreaks. Ecological niche modeling using Maximum Entropy (MaxEnt) was used to determine the effects of environmental factors on the infestation of A. rigidus, and map its potential distribution in the Philippines to assess the risk of future outbreaks. The influence of bioclimatic variables on A. rigidus infestation was determined using MaxEnt modeling using the location data of A. rigidus occurrence confirmed using molecular markers. Rainfall and temperature variables were important for A. rigidus distribution with rainf...
The coconut scale insect (CSI) Aspidiotus rigidus Reyne (Hemiptera: Diaspididae) poses a significant threat to coconut production in the Philippines as shown by recent outbreaks. Ecological niche modeling using Maximum Entropy (MaxEnt) was used to determine the effects of environmental factors on the infestation of A. rigidus, and map its potential distribution in the Philippines to assess the risk of future outbreaks. The influence of bioclimatic variables on A. rigidus infestation was deter...
The Role of α-Tocopherol in Mitigating the Effect of Elevated CO2 Concentrations Emitted from the AL-Hunay Power Plant Main Station on Glycine max L. Plants
Mohammed Abdulrahman Almuwayhi
Received: 29 June 2020/ Revised: 14 December 2020/ Accepted: 4 January 2021
Soybean (Glycine max L.), belonging to Leguminosae, is an essential food in Asian countries. It has become a necessity to study the long-term effects of elevated concentrations of CO2 on plant growth and development. Climate change may be affected by the increment of CO2 and higher temperatures on crops. Elevated concentrations of atmospheric CO2 can negatively affect the yield as well as the quality of the field crops. Alpha-tocopherol is the major vitamin E compound found in leaf chloroplasts. This antioxidant deactivates photosynthesis-derived reactive oxygen species and prevents the propagation of lipid peroxidation by scavenging lipid peroxyl radicals in thylakoid membranes. AL-Hunay...
Soybean (Glycine max L.), belonging to Leguminosae, is an essential food in Asian countries. It has become a necessity to study the long-term effects of elevated concentrations of CO2 on plant growth and development. Climate change may be affected by the increment of CO2 and higher temperatures on crops. Elevated concentrations of atmospheric CO2 can negatively affect the yield as well as the quality of the field crops. Alpha-tocopherol is the major vitamin E compound found in leaf chloroplas...
Taxonomic Microbiome Profiling and Abundance Patterns in the Cacao (Theobroma cacao L.) Rhizosphere Treated with Arbuscular Mycorrhizal Fungi and Bamboo Biochar
Angelbert D. Cortes, Nelly S. Aggangan, and Rina B. Opulencia
Received: 20 August 2020/ Revised: 12 December 2020/ Accepted: 16 December 2020
Biochar and arbuscular mycorrhizal fungi (AMF) are agricultural interventions adopted by farmers to improve the growth of crops in nutrient-deficient acidic soil, which relatively influence the biological properties in the rhizosphere. This greenhouse study investigated the changes in prokaryotic diversity in the rhizosphere of cacao plants grown in acidic soil with AMF and bamboo biochar (BB) for 15 months under nursery conditions. Metagenomic analysis of the V3-V4 region of the 16S rRNA gene of the rhizosphere with AMF, 15% BB, and AMF + 15% BB revealed that the addition of AMF and BB reduced the sample's diversity, but the treatments increased the overall plant growth. Of all Operation...
Biochar and arbuscular mycorrhizal fungi (AMF) are agricultural interventions adopted by farmers to improve the growth of crops in nutrient-deficient acidic soil, which relatively influence the biological properties in the rhizosphere. This greenhouse study investigated the changes in prokaryotic diversity in the rhizosphere of cacao plants grown in acidic soil with AMF and bamboo biochar (BB) for 15 months under nursery conditions. Metagenomic analysis of the V3-V4 region of the 16S rRNA gen...
Postharvest Salicylic Acid and Melatonin Dipping Delay Ripening and Improve Quality of ‘Sensation’ Mangoes
Mohamed A. Awad and Adel D. Al-Qurashi
Received: 14 October 2020/ Revised: 05 February 2021/ Accepted: 08 February 2021
Freshly harvested mature-green ‘Sensation’ mangoes were dipped for 10 min in 2 mM salicylic acid (SA) and 0.2 mM melatonin (MT) alone or in combination and stored at 23±1°C and 60–70%RH. SA or MT delayed ripening measured as higher green peel color (lower a* values), firmness, titratable acidity (TA) and membrane stability index (MSI) and lower weight loss, total soluble solids (TSS), TSS/TA ratio and hydrolytic enzyme activities (polygalacturonase, xylanase and α-amylase) compared to that of untreated fruit. Total phenolic content (TPC) in peel of treated fruit increased with fluctuations during ripening and was higher than the control. In pulp, TPC decreased up to 6 days but increased t...
Freshly harvested mature-green ‘Sensation’ mangoes were dipped for 10 min in 2 mM salicylic acid (SA) and 0.2 mM melatonin (MT) alone or in combination and stored at 23±1°C and 60–70%RH. SA or MT delayed ripening measured as higher green peel color (lower a* values), firmness, titratable acidity (TA) and membrane stability index (MSI) and lower weight loss, total soluble solids (TSS), TSS/TA ratio and hydrolytic enzyme activities (polygalacturonase, xylanase and α-amylase) compared to that of...
Morphological and Microsatellite-Based Molecular Characterization of Locally Collected Sugarcane (Saccharum officinarum L.)
Carl F. Libayao, Ma. Carmina C. Manuel, Eureka Teresa M. Ocampo, and Antonio G. Lalusin
Received: 06 March 2020/ Revised: 02 February 2021/ Accepted: 08 February 2021
Fifty-three sugarcane accessions from Aklan, Iloilo, Cagayan, Nueva Vizcaya, Isabela, and Bohol were characterized using forty-two morphometric parameters and forty microsatellite markers. Twenty-six morphological characters using the Shannon-Weaver diversity index showed high variability (H’ = > 0.76) and were able to characterize the fifty-three sugarcane accessions. Cluster analysis of morphological traits based on sequential agglomerative hierarchical test and Euclidean distance revealed two groupings at 0.3 coefficient of dissimilarity. The clustering of some accessions was irrespective of their geographical origin indicating a high degree of phenotypic similarity in some accessio...
Fifty-three sugarcane accessions from Aklan, Iloilo, Cagayan, Nueva Vizcaya, Isabela, and Bohol were characterized using forty-two morphometric parameters and forty microsatellite markers. Twenty-six morphological characters using the Shannon-Weaver diversity index showed high variability (H’ = > 0.76) and were able to characterize the fifty-three sugarcane accessions. Cluster analysis of morphological traits based on sequential agglomerative hierarchical test and Euclidean distance reveal...
