Firmansyah
@firm014@brin.go.id
Research Center for Food Crops
National Research and Innovation Agency
RESEARCH, TEACHING, or OTHER INTERESTS
Plant Science, Agronomy and Crop Science, Agricultural and Biological Sciences, Insect Science
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Firmansyah and Ema Komalasari
AIP Publishing
Muhammad Fuad Anshori, Yunus Musa, Novaty Eny Dungga, Nuniek Widiayani, Arfina Sukmawati Arifin, Andi Masniawati, Firmansyah Firmansyah, Muh Farid, Andi Dirpan, and Azmi Nur Karimah Amas
Frontiers Media SA
The development of cayenne pepper varieties can be optimized by multiple crossings, transgressive segregant selection based on the selection index, and identification of potential anthocyanins. The study objectives were (1) to develop a transgressive segregation index, and (2) to select transgressive segregation cayenne peppers with high productivity and anthocyanins from F3 multiple cross-generation. The study conducted two experiments at the experimental field, Hasanuddin University, from November 2022 to November 2023. The first experiment implemented an augmented design with a randomized complete block design (RCBD) as an environmental design. The genotypes as treatment consisted of two types: 110 lines of cayenne pepper were not repeated, and the 4 older chili varieties as controls were repeated in each block. All genotypes were categorized and divided into five blocks. The second experiment was the validation of the first trial. There were 13 genotypes tested with RCBD design one factor and repeated three times. Based on the study, developing a semi-objective-based selection index with canopy width, fruit weight, and yield was an innovative and effective approach to selecting F3 transgressive segregants of cayenne pepper. High-yielding transgressive lines were identified as G3-2-7-3, G2.6.9–10, G5-12–1-8, and G4.5.2–12. The G3-2-7-3 line was suggested due to its high yield potential and anthocyanin content. However, the anthocyanin content must be examined more deeply, such as using an omics approach. Nevertheless, these lines are still recommended to be continued in yield testing or crossing to produce hybrid lines that have high yield potential and anthocyanin content.
Elisurya Ibrahim, Firmansyah Firmansyah, and Sumarni Panikkai
IOP Publishing
Abstract Green leafhopper (Nephotettix virescens) is one of the major pests on rice plants that can be a vector of tungro disease. Current pest control using insecticides by farmers is very worrying because in general it is not as recommended which can cause disturbances in the balance of the ecosystem, so it is necessary to use more environmentally friendly control alternatives, one of which is the use of entomopathogenic fungi that are targeted and do not cause the death of natural enemies. The potential of entomopathogenic fungi as biological control agents needs to be continuously developed to reduce the use of insecticides, one of which is the fungus Metarhizium anisopliae which is a type of entomopathogenic fungus that can kill insect pests. The purpose of this study was to determine the effect of several concentration and application method of M. anisopliae on the mortality of the green leafhopper (Nephotettix virescens). The study was conducted in the Laboratory and Greenhouse of the Tungro Disease Research Station starting from February - April 2020 using a two-factor factorial design in a completely randomized design (CRD). The first factor was the application method consisting of two treatments, namely the spray method (A1) and dip method (A2) while the second factor was the conidia density of Metarhizium anisopliae with 4 levels, namely 0 (C0) as control, conidia density 106 (C1) conidia density 107 (C2) conidia density 108(C3). Each treatment was repeated three times. The results showed that the concentration of 106 by dipping application showed the fastest average death time of green leafhopper imago, which occured after 4 days of application, while the fastest average death time of green leafhopper nymph was 3.67 days after application at a concentration of 10 7 by dipping applications.
Firmansyah and N Argosubekti
IOP Publishing
AbstractThe threat and crisis of food due to global warming has a related with global climate change. The threat of a decline in food production in various countries by climate change triggers a long drought. The increase in temperature causes heat stress on the plant which has an impact on the decline in land quality and others. Heat stress is often defined as an increase in temperature for a certain period of time, which can cause irreversible damage to plants, which generally occurs at temperatures of 10-15°C above the threshold. Heat stress is a major factor limiting crop productivity and adaptation, especially when extreme temperatures coincide with the critical stage of plant growth. Heat stress is a major factor limiting crop productivity and adaptation, especially when extreme temperatures coincide with the critical stage of plant growth. Excessive heat can disrupt by denaturing enzymes and damaging metabolism so that changes occur in the morphological structure, phenology, physiology and molecular plants. The response to increase in temperature of 5-10° C, makes plants produce a unique protein called heat shock proteins (HSP). An increase in HSP production occurs when plants experience a sudden or gradual increase in temperature. HSP is released when the stress of exposed to plant. Under these conditions HSP is useful for protecting proteins and causes resistant plants. The resistance obtained by heat shock is different from the resistance obtained by rapid growth at moderately high temperatures. This difference is presumed by the presence of HSP responses induced by heat stress. The HSP can play a role as a sign of gene stress and activation and in regulating oxidation reactions in cells. Utilization of heat stress signaling in food crops breeding can be used to development Wheat Tolerance to High Temperature.