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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Indonesian Journal of Forestry Research
Muhammad Jusuf
Department Biolog y, Faculty of Mathematic and Natural Sciences, Bogor Agricultural University
Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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DISTRIBUTION OF Hoya multiflora Blume AT GUNUNG GEDE PANGRANGO NATIONAL PARK, INDONESIA Rahayu, Sri; Kusmana, Cecep; Abdulhadi, Rochadi; Jusuf, Muhammad; Suharsono, Suharsono
Indonesian Journal of Forestry Research Vol 7, No 1 (2010): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Hoya multiflora is one of the valuable germplasm in Indonesia that has been utilized as ornamental and medicinal plant. This epiphytic plant faces problems in decreasing habitat. As a means for developing a habitat framework for describing the distributions and ecological relations of H.multiflora at Gunung Gede Pangrango National Park, Bogor, Indonesia, ecological study of this species was established over the ranges of altitudes and characteristic vegetation structural types (primary and secondary forest, and plantation) present in the Park. Recognizing the fact that such study requires multidisciplinar y data, this paper explores the evidences from both herbarium sheets and field observations. The result of the study showed that the population of this species was only found at the Bodogol Research Station at elevation of 700 - 900 m above sea level (a.s.l.). Thus, the facts contradict with the evidence from the herbarium sheets of the Herbarium Bogoriense which have presumed that this species has a wide variation of altitudinal range from 20 to 1500 m a.s.l. (Indonesia) or 200 - 1400 m a.s.l. ( Java). The Bodogol’s population showed the clumped type of dispersion (Morisita’s Index = 1.35), which indicated such environment that was characterized by patchy resources. Direction and speed of wind coupled with the topography are ecological factors that affect to the distribution of this parachute typed seeds of the H.multiflora.
DISTRIBUTION OF Hoya multiflora Blume AT GUNUNG GEDE PANGRANGO NATIONAL PARK, INDONESIA Rahayu, Sri; Kusmana, Cecep; Abdulhadi, Rochadi; Jusuf, Muhammad; Suharsono, Suharsono
Indonesian Journal of Forestry Research Vol 7, No 1 (2010): Journal of Forestry Research
Publisher : Secretariat of Forestry Research and Development Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/ijfr.2010.7.1.42-52

Abstract

Hoya multiflora is one of the valuable germplasm in Indonesia that has been utilized as ornamental and medicinal plant. This epiphytic plant faces problems in decreasing habitat. As a means for developing a habitat framework for describing the distributions and ecological relations of H.multiflora at Gunung Gede Pangrango National Park, Bogor, Indonesia, ecological study of this species was established over the ranges of altitudes and characteristic vegetation structural types (primary and secondary forest, and plantation) present in the Park. Recognizing the fact that such study requires multidisciplinar y data, this paper explores the evidences from both herbarium sheets and field observations. The result of the study showed that the population of this species was only found at the Bodogol Research Station at elevation of 700 - 900 m above sea level (a.s.l.). Thus, the facts contradict with the evidence from the herbarium sheets of the Herbarium Bogoriense which have presumed that this species has a wide variation of altitudinal range from 20 to 1500 m a.s.l. (Indonesia) or 200 - 1400 m a.s.l. ( Java). The Bodogol’s population showed the clumped type of dispersion (Morisita’s Index = 1.35), which indicated such environment that was characterized by patchy resources. Direction and speed of wind coupled with the topography are ecological factors that affect to the distribution of this parachute typed seeds of the H.multiflora.
Keragaan dan Keragaman Genetik Sifat-sifat Kuantitatif Kedelai (Glycine max L. Merrill) pada Generasi Seleksi F6 Persilangan Varietas Slamet x Nakhonsawan1 Jambormias, Edizon; Sutjahjo, Surjono H.; Jusuf, Muhammad; Suharsono, ,
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 35 No. 3 (2007): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1033.104 KB) | DOI: 10.24831/jai.v35i3.1327

Abstract

A field experiment to obtain new improved soybean varieties with higher yield and seed size was conducted by crossing Slamet Variety (high yield, small seed size) with Nakhonsawan (large seed size) in order to produce F6 selected generation. The process of selection and evaluation was conducted during a 3.5 month period, from August to December 2003 in KP IPB Sindang Barang Bogor. The pedigree selection method was used in the experiments. Data was analyzed based on information of set of total data, relatives and individually. The results showed that low performance for all traits compared to the Slamet variety except seed size and seed production traits, and higher than Nakhonsawan variety except seed size. However, genetic variances and heritabilities were high for all traits except number of branch. On the other hand, distribution of genetic variances and heritabilities on all levels of relatives were small except for the within-family F6 generations. This indicated that there was an effect of over-dominance gene action. Conclusion of analysis showed existence of two families with high seed production and seed size if compared to Slamet variety.   Key words: Soybean, selection, performance, genetic variability, and heritabilities.
Analisis Generasi F2 dan Seleksi Pertama dari Persilangan Kedelai antara Kultivar Slamet dan Wase Suharsono, ,; Jusuf, Muhammad
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 37 No. 1 (2009): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v37i1.1390

Abstract

The research had an objective to analyse the population of F2 and first selection (S1) generations of the cross between soybean cultivar Slamet and Wase. The ultimate goal of this research is to obtain the elite cultivars of soybean having high yield, big seeds, and tolerant to acid and aluminum stresses. The genetic variance and heritability in the broad sense of all characters observed of F2 population were very high. The seed productivity of F2 population was higher than that of Slamet and Wase cultivars. The size of seeds of F2 population was bigger than that of Slamet and comparable to that of Wase. The heritability in the broad sense of all characters of F2 population was very high because the maximum segregation occurs in F2 and the two parents had a very different genetic back ground. By using 7.5% selection intensity based on productivity, we got selected F2 population having productivity two times than that of Slamet. Seeds of this selected F2 population were bigger than that of F2 population and cultivar Slamet. The S1 population had seed productivity higher than Slamet and Wase cultivars. The heritability in the broad sense of all characters of S1 population was smaller than that of F2 population caused by the selection. The selection by 4.8% intensity resulted the selected S1 population having productivity three times than that of cultivar Slamet and big seeds. The selected S1 population had a phenotype variance of productivity smaller than S1 population. Therefore, the selected S1 population is very potential to be developed as elite soybean cultivars.   Key words: soybean, genetic variance, heritability, selection, F2 population
TOLERANSI TANAMAN KEDELAI TERHADAP CEKAMAN AIR: UJI LAPANG BEBERAPA GENOTIPE TOLERAN Sopandie, Didy; Hamin, ,; Jusuf, Muhammad; Supijatno, ,
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 25 No. 2 (1997): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (502.11 KB) | DOI: 10.24831/jai.v25i2.1609

Abstract

The purpose of this field verification was to determine the stability of yield of several drought-tolerant soybean genotypes selected from green house evaluation. The plants were planted at Muneng, Probolinggo in dry season (June-September 1995) with and without irrigation. From 5 tolerant genotypes, Mlg 2999 and Mlg 3474 gave a good stability of tolerance as evidence by less significance of growth and grain yield reduction. The tolerant genotypes of Mlg 2805 and Mlg 2984 suffered from tremendous leaves and pods abcission, leading to low yield.
TOLERANSI TANAMAN KEDELAI TERHADAP CEKAMAN AIR : AKUMULASI PROLIN DAN ASAM ABSISIK DAN HUBUNGANNYA DENGAN POTENSIAL OSMOTIK DAUN DAN PENYESUAIAN OSMOTIK Sopandie, Didy; Hamim, ,; Jusuf, Muhammad; Heryani, Nani
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 24 No. 1 (1996): Buletin Agronomi
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (991.078 KB) | DOI: 10.24831/jai.v24i1.1616

Abstract

In this experiment. the changes on leaf osmotic potential and accumulation of proline and abscisic acid were identified from drought-tolerant and drought - sensitive soybean genotypes. Three drought - tolerant (Mlg 2805, Mlg 2984 and Mlg 2999) and two sensitive soybean genotypes (Mlg 2510 and Mlg 3541) were subjected to drought condition created by regulating water supply in greenhouse.  The results revealed that exposing plants to drought stress brought about a decrease of leaf osmotic potential. The decrease of which was greater in drought-tolerant genotypes (6.91 to 10.11 bars) than in sensitive genotypes (0.55 to 0.69 bars). The decreasing of leaf osmotic potential was followed with increasing praline accumulation, especialy for Mlg 2805. Only Mlg 2805 showed the significant ABA accumulation when the plants were subjected to drought stress. It is suggested that the drought tolerance was associated with the reduction of leaf osmotic potential (osmotic adjusment) in which proline might play an important role. The role of ABA could not be clarified since there had been a great variability in ABA content of all tolerant genotypes.
Co-Authors , Hamin , Suharsono Didy Sopandie Edison Jambormias Hamim Hamim Nani Heryani Rochadi Abdulhadi SRI RAHAYU Suharsono Suharsono Supijatno Surjono H. Sutjahjo