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All Journal Jurnal Biologi Tropis
M. Taufik Fauzi
Universitas Mataram
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Immunology & microbiology

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Estimation of Variance and Heritability Components in F2 Populations of Maize (Zea mays L.) in Dry Land Amanah Aulia Adeputri; M. Taufik Fauzi; Suwardji; A. A. Ketut Sudharmawan
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i4.5326

Abstract

The F2 population of maize plants that has been obtained from hybridization between NK212 and NK7328 varieties has not been suspected of genetic diversity components and heritability in the narrow sense. This study aimed to determine the magnitude of the alleged value of variety components and heritability, as well as determine the types of varieties to be formed. The experimental design used was the Group Randomized Design (RAK) - North Carrolina I (NCI) consisting of 120 treatments. The experimental setup involved 40 male parent plants, each paired with 3 female parent plants in season I, and this procedure was replicated twice, resulting in a total of 240 treatment groups. The collected data was subjected to analysis through variety analysis (ANOVA) utilizing the NCI model. The results showed that the presumptive value of additive variety and dominant variety based on the results of data analysis varied, but in all observed traits the dominant variety value tended to be greater. Most of the observed traits have a negative heritability presumptive value, except for stem diameter, panicle exit age, fresh pruning weight, and 1000 seed weights. The conclusion obtained is that most of the observed properties have additive variance values and negative heritability values; the dominant variance value in all observed properties is greater than that of additive variety; The heritability of most traits cannot be predicted because they are negative. Therefore, it is advisable for the improvement of the F2 population is with the formation of hybrids.
Genetic Parameters of Rice Strains (Oryza sativa L.) Functional for Development and Increasing Production in Medium Plain Dry Lands Amilia Qurota A'yun; M. Taufik Fauzi; Suwardji; A. A. K. Sudharmawan
Jurnal Biologi Tropis Vol. 23 No. 2 (2023): Special Issue
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i2.5331

Abstract

Functional rice is a food that contains more than one forming component that is useful for health. Nowadays public interest in functional food is increasing, so functional rice production needs to be increased. Therefore, this research was conducted with the hope of obtaining information on superior agronomic characters to increase the yield power of functional rice strains. The method used was experimental using a randomized group design (RAK). Data analysis consists of Analysis of Variance, genetic diversity coefficient, phenotype diversity coefficient, genotype correlation, phenotype correlation, and heritability in a broad sense. The results showed that the heritability value of high area meaning is found in the character of flowering, harvest age, plant height, panicle length of the amount of grain contained, and the amount of empty grain. The high value of the KKG and KKF is indicated by the character of the number of non-productive saplings, while the lowest value is indicated by the character of the age of harvest. All quantitative characters observed showed positive genotypic correlation results to grain weight per clump. While in phenotypic correlation only the character of plant height, panicle length, the amount of grain containing, the amount of hollow grain and the weight of 100 grains are positive. Based on the analysis that has been carried out the character  of plant height, panicle length, the amount of grain containing the amount of hollow grain and the weight of 100 grains need to be taken into account as selection criteria to obtain high-yielding functional rice.
Determination of PEG (Polyethlenee Glycol) Concentration and Dosage to Evaluate The Resistance of Rice (Oryza Sativa L.) to Drought Siti Raihanun; M. Taufik Fauzi; Suwardji Suwardji; A.A.K Sudharmawan
Jurnal Biologi Tropis Vol. 23 No. 4 (2023): October - December
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v23i4.5332

Abstract

The writing is intended to assess the response of rice plants to the germination phase through induce concentrations and a dose of the PEG. Library research is used in this writing by locating and collecting libraries that were generated by earlier research. As for the data obtained in this writing, it is the result of analysis of various vets and rice varieties of Cempo Laut, Edok, Mutant Galurses (M5-GR150 1-4, M5-GR150 1-9, M5-GR200 1-2, M5-GR150 2-2, M5-GR150 2-3), Legowo, Malihan Ketan, Mlarak 1, Inpago, IR 64, Palenok, Philips, Radix. Concentrations of PEG 6000 and 8000 with a dose of 0%, 5%, 15%, 20% and 25% induced, then treated with the best denunciation. Observation data indicate that each response is different. PEG concentration of 8000 and dose of -0.5 MPa gave the best germination power.
Effects of Salinity Stress and ACC Deaminase Sidr Root PGPR Frequency on Growth and Yield of Chili Pepper Niza Isfiyana; Aluh Nikmatullah; M. Taufik Fauzi
Jurnal Biologi Tropis Vol. 26 No. 3 (2026): Juli - September
Publisher : Biology Education Study Program, Faculty of Teacher Training and Education, University of Mataram, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jbt.v26i3.12625

Abstract

Salinity stress is a major abiotic factor limiting chili pepper (Capsicum annuum L.) production by reducing water and nutrient uptake and increasing stress-induced ethylene accumulation. Plant Growth-Promoting Rhizobacteria (PGPR) producing 1-aminocyclopropane-1-carboxylate (ACC) deaminase have emerged as a promising biological approach to alleviate salt stress by lowering ethylene levels and promoting plant growth. This study aimed to evaluate the interaction between salinity levels and the application frequency of ACC deaminase-producing PGPR isolated from bidara (Ziziphus mauritiana) roots on chili pepper growth. A factorial randomized complete block design was employed with two factors: salinity levels (0, 2, 4, and 8 dS m⁻¹) and PGPR application frequencies (0, 1, 2, and 3 applications). Data were analyzed using analysis of variance followed by Tukey's HSD test at a 5% significance level. Significant interactions were observed for plant height, leaf number, fresh biomass, root biomass, shoot dry weight, and total dry weight. Increasing salinity significantly reduced plant growth, whereas repeated PGPR application improved vegetative performance. The highest biomass was obtained under non-saline conditions with two PGPR applications, while three applications produced the greatest plant height and leaf number. These findings demonstrate that ACC deaminase-producing PGPR from bidara roots effectively mitigates salinity stress and has potential as an environmentally friendly bioinoculant to improve chili pepper growth under saline conditions.
Co-Authors A. A. Ketut Sudharmawan Aluh Nikmatullah Amanah Aulia Adeputri Amilia Qurota A'yun Niza Isfiyana Siti Raihanun Suwardji Suwardji