Seleksi Segregan Gandum (Triticum Aestivum L.) pada Dataran Tinggi

Pedigree selection is a method of selection used in segregating populations which takes the expertise of breeders in achieving the desired goal. This method is implemented on the early generations with a high degree of segregation and is generally performed on highly heritable traits. The purpose of this research was to study the performance of F3 generation segregants and to estimate the genetic parameters to be used for identification and selection of wheat segregants under optimum environmental condition. The research was carried out at the experiment field of Research Institute for Ornamental Crops, in Cipanas from May to September 2012. Genetic material used were 58 F3 family and six check varieties, namely Dewata, Selayar, Oasis, Rabe, Basribey, and HP 1744. The experiment used an augmented design. Results of analysis of variance showed that the family effect was significant for days to flowering, days to harvest, percentage of empty florets, number of grains per panicle, grain weight per panicle, number of seeds per plant and seed weight per plant. High heritability estimates were found in days to flowering, days to harvest, seed filling period, percentage of empty florets, number of grains per panicle, grain weight per panicle, number of seeds per plant, and seed weight per plant. These characters are suitable for yield improvement of tropical highland wheat due to its high heritability values. The mean value of F3 generation changes subsequent to selection either based on grain weight per plant, or based on number of productive tillers, number of grain per panicle, and grain weight per plant

Analisis Dialel untuk Pendugaan Parameter Genetik Komponen Hasil pada Cabai (Capsicum Annuum L.) Menggunakan Metode Hayman

The diallel cross analysis method was developed to obtain genetic information involved in a population formed closely to Hardy-Wienberg equilibrium. The objective of this research was to study the genetic parameters on yield component of crossing on big and curly species of red pepper using Hayman approach for dialel cross-analysis method. This approach used 6 parental genotypes and 30 full-diallel cross combinations F1 hybrids. Appearance of the character was controlled by one up to two groups of positive additive genes. Each character observed has a partial dominance. Dominant genes were found much more in the parental characters of weight per plant (IPBC120), flesh thickness of fruit (IPBC2), fruit diameter (IPBC159), and fruit length (IPBC2). The broad sense heritability values on each character was high. Whereas, narrow sense heritability value for some characters were also high, except for character of weight per plant which were moderate

Pendugaan Parameter Genetik Karakter Morfo-Agronomi dan Seleksi Genotipe untuk Perbaikan Genetik Jarak Pagar

The recent scarcity of fuel has stimulated many efforts to remove dependence on petroleum oil by finding alternative sources of new and renewable energy. Jatropha curcas L. has been chosen as a source of biofuel that has an important role as a petroleum oil substitute, especially for producing biodiesel. Possible efforts for the development of Jatropha in Indonesia include exploration of Jatropha plants from various regions of Indonesia, introducing the plants from abroad and plant breeding. The purpose of this study was to study the genetic parameters of morpho-agronomic traits and selection of potential genotype for genetic improvement of Jatropha curcas. The experiment was conducted at the Biotech Center, BPPT from November 2011 to July 2012. The experiment was performed using a complete randomized block design with sixteen genotypes of J. curcas. Five plants were used for each genotype, with three replications. Results of this study showed that genetic diversity of the genotypes based on morpho-agronomic characters was relatively narrow, with genetic diversity coefficient ranged from 2.73% to 9.02%. The broad-sense heritability was high for all characters, ranged from 32.26% to 85.89%. None of morpho-agronomic characters observed in the 16 genotypes was directly correlated to productivity and seed oil content. Number of fruit and total seed number per bunch were the best characters for selection criteria to obtain high dry seed weight. Based on the bi-plot analysis on seed oil content and dry weight characters among the observed genotypes, LMP and CRP x PDI could be recommended as potential F1 parents to be used in constructing F2 population

Analisis Dialel untuk Pendugaan Parameter Genetik Komponen Hasil pada Cabai (Capsicum Annuum L.) Menggunakan Metode Hayman

The diallel cross analysis method was developed to obtain genetic information involved in a population formed closely to Hardy-Wienberg equilibrium. The objective of this research was to study the genetic parameters on yield component of crossing on big and curly species of red pepper using Hayman approach for dialel cross-analysis method. This approach used 6 parental genotypes and 30 full-diallel cross combinations F1 hybrids. Appearance of the character was controlled by one up to two groups of positive additive genes. Each character observed has a partial dominance. Dominant genes were found much more in the parental characters of weight per plant (IPBC120), flesh thickness of fruit (IPBC2), fruit diameter (IPBC159), and fruit length (IPBC2). The broad sense heritability values on each character was high. Whereas, narrow sense heritability value for some characters were also high, except for character of weight per plant which were moderate