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Journal of the Indonesian Tropical Animal Agriculture
Published by Universitas Diponegoro
ISSN : 20878273     EISSN : 24606278     DOI : -
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences
Journal of the Indonesian Tropical Animal Agriculture (JITAA) is a double blind peer-reviewed publication devoted to disseminate all information contributing to the understanding and development of animal agriculture in the tropics by publication of original research papers
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Pertanian dan Biologi (Lain-Lain)
Articles 685 Documents
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Association analysis of the transforming growth factor factor-β2 gene with growth performance in Kedu chickens Akramullah, M.; Kurnianto, E.; Lestari, D. A.; Setiatin, E. T.; Palupi, D. Y.; Anjani, Y. N.; Dewi, G. P.; Setiaji, A.
Journal of the Indonesian Tropical Animal Agriculture Vol 51, No 1 (2026): March
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.51.1.72-81

Abstract

The Transforming Growth Factor-β2 (TGF-β2) gene is one of the cytokine genes that plays an important role in regulating growth processes and disease resistance. This study aimed to analyze the association between the TGF-β2 gene and growth performance in Kedu chickens. A total of 130 Kedu chickens, consisting of 72 males and 58 females, were observed for 10 weeks. Growth parameters measured included body weight, feed intake, body weight gain, and feed conversion ratio. Identifica-tion of the single nucleotide polymorphism (SNP) in the TGF-β2 gene was performed using the PCR-RFLP method. The association analysis between the g.640 T>C SNP polymorphism of the TGF-β2 gene and growth performance was conducted using analysis of variance under a General Linear Model (GLM). The results showed that the g.640 T>C SNP of the TGF-β2 gene was polymorphic and not in Hardy–Weinberg equilibrium. The TT genotype exhibited better growth performance (body weight gain, feed intake, and feed conversion ratio) than the CC genotype, particularly at 10 weeks of age in both female and unsexed chickens.
Back-matter (Maret 2026) Wibowo, Rahmat
Journal of the Indonesian Tropical Animal Agriculture Vol 51, No 1 (2026): March
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.51.1.%p

Abstract

Back-matter (Maret 2026)
Front-matter (Maret 2026) Wibowo, Rahmat
Journal of the Indonesian Tropical Animal Agriculture Vol 51, No 1 (2026): March
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.51.1.%p

Abstract

Front-matter (Maret 2026)
Factors affecting dairy milk production and their associations under practical conditions in Northeastern Thailand Supakorn, C.; Deawtrakoon, P.; Maneerat, W.
Journal of the Indonesian Tropical Animal Agriculture Vol 51, No 1 (2026): March
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.51.1.47-59

Abstract

This study investigated factors influencing milk production in terms of quantity (raw milk yield) and quality (%fat, %protein, %lactose, %total solids, and log somatic cell counts (log SCC)) and exam-ined the associations among these traits in the morning (am) and evening (pm) milking sessions. Data were collected from the Herd Health Unit under the supervision of the Livestock Regional Office 3, Northeastern Thailand, during 2022 to 2025. Statistical analyses included analysis of variance (ANOVA) to assess fixed effects, Tukey’s Honestly Significant Difference (HSD) test for mean com-parisons, and Pearson’s correlation analysis. Fixed effects included diurnal difference, groups of tem-perature-humidity index (THI), milk collecting center types (MCC type), and their interactions. The interaction between diurnal difference and MCC type significantly affected raw milk yield, %fat, %lactose, %total solids, and log SCC (P < 0.001). Morning milk yield was highest in dairy cooperatives (10.80 tons; P < 0.05), while evening fat percentages were highest in private organizations (4.02%) and dairy cooperatives (3.97%) (P < 0.05). Lactose percentages were significantly lower in the university affiliated centers for both morning (4.55%) and evening (4.56%) sessions (P < 0.05). Morning total solids were highest in private organizations (12.8%) and dairy cooperatives (12.6%) (P < 0.05), and log SCC values were generally higher in the morning across all MCC types. The THI significantly influ-enced %lactose and %total solids (P < 0.001), with THI class A (72 to79.9) exhibiting higher lactose (4.7%) and total solids (12.6%) than other classes (P < 0.05). Correlation analyses demonstrated signif-icantly positive associations between the traits in the morning and evening sessions (r = 0.52 to 0.79), positive correlations between raw milk yield and milk composition across diurnal differences (r = -0.05 to 0.83), negative correlations between milk composition and log SCC (r = -0.38 to -0.01), and low positive correlations between raw milk yield and log SCC (r = 0.08 to 0.11). These findings demon-strate that milking time, MCC type, and heat stress all contribute to the composition and yield of milk, providing insights for the optimization of dairy management in tropical conditions.
E ffect of supplementation of Typha domingensis Pers. fruit powder and aqueous extract on productive performance and some physiological characteristics of broiler chickens Abbas, R. J.; Sukkar, S. T.
Journal of the Indonesian Tropical Animal Agriculture Vol 51, No 1 (2026): March
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jitaa.51.1.60-71

Abstract

This study evaluated the effects of dietary supplementation with Typha domingensis Pers. fruit flour (TDF) and its aqueous extract (TDE) on growth performance, physiological responses, and gut microbial balance in broiler chickens. A total of 216 one-day-old chicks were allocated at seven days of age into six treatment groups. Birds received either a basal diet (T1, control), TDE supplementation in drinking water at 5 or 15 mL/L (T2 and T3), TDF inclusion in feed at 5 or 15 g/kg (T4 and T5), or a combined supplementation of TDF and TDE at 7.5 units each (T6). Supplemented groups exhibited significant improvements (p ≤ 0.05) in final body weight, body weight gain, feed conversion ratio, pro-duction index, performance index, and economic efficiency compared with the control group. Addi-tionally, the relative weight of the bursa of Fabricius increased, whereas abdominal fat deposition de-creased. Blood biochemical analysis revealed significant reductions in serum cholesterol, triglycerides, low-density lipoprotein (LDL), aspartate aminotransferase (AST), and alanine aminotransferase (ALT), accompanied by increased high-density lipoprotein (HDL) levels. Antioxidant status was enhanced, as indicated by elevated superoxide dismutase (SOD) and glutathione peroxidase (GSH-PX) activities. Microbiological assessment demonstrated reduced total bacterial counts and Escherichia coli, along-side increased populations of beneficial Lactobacillus spp. In conclusion, supplementation with TDF and TDE positively influenced growth performance, metabolic health, antioxidant capacity, and intesti-nal microbial balance in broiler chickens, suggesting their potential as natural feed additives to improve poultry productivity and health.

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