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INDONESIA
Indonesian Journal of Agricultural Science
Published by Kementerian Pertanian
ISSN : 1411982X     EISSN : 23548509     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
The journal publishes primary research articles from any source if they make a significant original contribution to the experimental or theoretical understanding of some aspect of agricultural science in Indonesia. The definition of agricultural science is kept as wide as possible to allow the broadest coverage in the journal. Accredited base on Director Decree of Indonesian Institute of Science No. 816/D/2009 with acreditation No. 172/AU1/P2MBI/08/2009. IJAS is newly accredited by the Indonesian Institute of Science in 2012 (No. 473/AU2/P2MI-LIPI/08/2012) for period of 2012-2015.
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Articles 10 Documents
 1 
Search results for , issue "Vol 9, No 2 (2008): October 2008" : 10 Documents clear
MYCOTOXIN CONTAMINATION ON CORN USED BY FEED MILLS IN INDONESIA Tangendjaja, Budi; Rachmawati, Sri; Wina, Elizabeth
Indonesian Journal of Agricultural Science Vol 9, No 2 (2008): October 2008
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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

Abstract

Mycotoxins which are secondary metabolites of fungi contaminate agricultural products such as corn and have deleterious effects on human and animal. The objective of this study was to evaluate the mycotoxin contamination on local and imported corn samples collected from different feed mills in Indonesia. Three hundred fifty six of corn samples (0.50 kg each) were sent by several feed mills to the Indonesian Research Institute for Animal Production during 2005-2006. The background information accompanied with each sample was country/province of origins, harvesting seasons, postharvest drying methods, moisture levels, grades, and varieties. The samples were analyzed for various mycotoxins, i.e aflatoxin (AFL), ochratoxin (OCRA), zearalenone (ZEN), fumonisin (FUM), deoxynivalenol (DON), and T2 toxin using commercial kits, except for AFLwhich was analysed using a kit developed by the Indonesian Research Center for Veterinary Science. The results showed that average AFL level in the contaminated corn originated from Indonesia was 59 µg kg-1, almost 7 times higher than that imported from the USA or Argentina. Among the types of mycotoxins detected, FUM was the highest with an average of 1193 µg kg-1, followed by DON, ZEN and OCRA at level of 324, 22 and 2 µg kg-1, respectively. Mycotoxin levels in the contaminated local corn samples varied depending on the province of origins as well as harvesting seasons, postharvest drying methods, and moisture contents. The least mycotoxin contaminations were found on corn originated from NorthSumatra and Lampung with the AFL levels were < 20 and < 50 µg kg-1, respectively, lower than those from East Java, Central Java and South Sulawesi (64-87 µg kg-1). Mycotoxin levels, however, were less affected by grading made by feed mills and corn varieties. It is indicated that AFL was the most important mycotoxin as far as for animal feeding concerned, as itcontaminated almost 50% of local corn with the level of contamination above the Indonesian National Standard, i.e. 50 µg kg-1. The study suggests that postharvest methods of local corn must be improved to reduce mycotoxin contamination.
PROPERTIES AND MANAGEMENT IMPLICATIONS OF SOILS FORMED FROM VOLCANIC MATERIALS IN LEMBANG AREA, WEST JAVA Yatno, Edi; Zauyah, Siti
Indonesian Journal of Agricultural Science Vol 9, No 2 (2008): October 2008
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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

Abstract

Soils formed from volcanic materials have a high potential for agricultural development, especially for horticultural crops, tea, and pine trees. Data on the characteristics of these soils are important for the management planning. Six representative soil profiles developed on andesitic volcanic ash and tuff in Lembang area, West Java were studied to determine the soil physical, chemical, and mineralogical properties, to study the relationship between the soil properties, and to classify the soils according to the Soil Taxonomy. The results indicated that all the soils had very deep (>150 cm) solum. In general, the volcanic ash soils were darker colored, more granular, more friable, less sticky and less plastic than the volcanic tuff soils. Physically, the ash soils had lower bulk density (0.44-0.73 mgm-3) and higher available water content (13-33%) than the tuff soils. Bulk density decreased with increasing allophane. Chemically, the ash soils had higher pHNaF (mostly > 10), higher organic carbon (4.3-6.8% in upper horizons), higher CEC (20- 44 cmolc kg-1), and higher P retention (> 85%) than the tuff soils. P retention logarithmically increased with increasing oxalate extractable Al and allophane. The sand fractions of the ash soils were dominated by hornblende, while the tuff soils were predominantly composed of opaque minerals. In the clay fractions, the ash soils were dominated by allophane, whereas the tuff soils showed high contents of gibbsite and metahalloysite. Soils developed on volcanic ash were classified as Thaptic Hapludands and Typic Melanudands, while soils formed from volcanic tuff were classified as Andic Dystrudepts. The low bulk density and friable consistency of the soils contributed to favorable soil tilth. However, high P retention and Al saturation in most soils are limiting factors for plant growth. Application of P fertilizers and liming coupled with efficient placement can be recommended to enhance P availability and reduce Al toxicity. Organic matter can be used to reduce Al toxicity. Soil conservation needs to be considered, especially in the steep slope areas.
IDENTIFICATION AND MAPPING OF A GENE FOR RICE SLENDER KERNEL USING Oryza glumaepatula INTROGRESSION LINES Sobrizal, Sobrizal; Yoshimura, Atsushi
Indonesian Journal of Agricultural Science Vol 9, No 2 (2008): October 2008
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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

Abstract

World demand for superior rice grain quality tends to increase. One of the  criteria of appearance quality of rice grain is grain shape. Rice consumers  exhibit wide preferences for grain shape, but most Indonesian rice consumers prefer long and slender grain. The objectives of this study were to identify and map a gene for rice slender kernel trait using Oryza  glumaepatula introgression lines with O. sativa cv. Taichung 65 genetic background. A segregation analysis of BC4F2 population derived frombackcrosses of a donor parent O. glumaepatula into a recurrent parent Taichung 65 showed that the slender kernel was controlled by a single recessive gene. This new identified gene was designated as sk1 (slender kernel 1). Moreover, based on the RFLP analyses using 14 RFLP markers located on chromosomes 2, 8, 9, and 10 in which the O. glumaepatula chromosomal segments were retained in BC4F2 population, the sk1 was located between RFLP markers C679 and C560 on the long arm of chromosome 2, with map distances of 2.8 and 1.5 cM, respectively. The wild rice O. glumaepatula carried a recessive allele for slender kernel. This allele may be useful in breeding of rice with slender kernel types. In addition, the development of plant materials and RFLP map associated with slender kernel in this study is the preliminary works in the effort to isolate this important grain shape gene.
ROLE OF POLYAMINES IN INHIBITION OF ETHYLENE BIOSYNTHESIS AND THEIR EFFECTS ON RICE ANTHER CULTURE DEVELOPMENT Dewi, Iswari S.; Purwoko, Bambang S.
Indonesian Journal of Agricultural Science Vol 9, No 2 (2008): October 2008
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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

Abstract

The polyamines such as putrescine, spermidine, and sperminewere reported to increase green plant regeneration in rice antherculture. Low response of anther culture of rice sub-speciesindica may be improved with the addition of putrescine in theculture media. Four experiments were conducted to study therole of polyamines in inhibition of ethylene biosynthesis andtheir effects on rice anther culture development. Anthers oftwo subspecies of rice, indica (IR64, Krowal, Jatiluhur) andjaponica (Taipei 309) were cultured onto media supplementedwith putrescine (N6P) and without putrescine (N6). Youngpanicles containing the anthers at mid-to-late nucleatemicrospores were cold pretreated at 5 + 2°C and incubated inthe dark for 8 days before the anthers were cultured. Resultsshowed that medium without putrescine produced an earliersenescence of indica rice anther than that of japonica. Theaddition of 10-3 M putrescine into the culture media inhibitedethylene biosynthesis as anther senescence delayed, increasedthe three polyamines contents, and decreased the ACC contentas well as ACC oxydase activity in anther-derived calli. In theanther and anther-derived calli of subspecies indica, the totalpolyamines content was lower (10.14 nM g-1 anther and 8.48 nMg-1 calli) than that of subspecies japonica (12.61 nM g-1 antherand 10.16 nM g-1 calli), whereas the ethylene production washigher (32.31 nM g-1 anther and 2.48 nM g-1 calli) than thejaponica (31.68 nM g-1 anther and 1.76 nM g-1 calli). This studysuggests that application of 10-3 M putrescine in anther cultureof rice subspecies indica improves androgenesis by inhibitingearly senescence of cultured anthers and enhancing embryo orcallus formation from microspores.
THE SEGREGATION PATTERN OF INSECT RESISTANCE GENES IN THE PROGENIES AND CROSSES OF TRANSGENIC ROJOLELE RICE Satoto, Satoto; Sulistyowati, Yuli; Hartana, Alex; -Loedin, Inez H. Slamet
Indonesian Journal of Agricultural Science Vol 9, No 2 (2008): October 2008
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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

Abstract

Successful application of genetic transformation technique, especially in developing rice variety resistant to brown plant hopper and stem borer, will depend on transgene being expressed and the gene inherited in a stable and predictable manner. This study aimed to analyse transgene segregation pattern of the progenies and the crosses of transgenic rice cv. Rojolele harboring cry1Ab and gna genes. The third generation (T2) of fivetransgenic Rojolele events containing gna and/or cry1Ab were evaluated for two generations to identify the homozygous lines and to study their inheritance. The homozygous lines were selected based on the result of PCR technique. The segregation patterns of gna and cry1Ab were studied in eight F2 populations derived from Rojolele x transgenic Rojolele homozygous for cry1Ab and or gna and their reciprocal crosses. Data  resulted from PCR of F2 population were analysed using a Chi Square test.The study obtained six homozygous lines for gna, namely A22- 1-32, A22-1-37, C72-1-9, F11-1-48, K21-1-39, K21-1-48, and two homozygous lines for cry1Ab, namely K21-1-39 and K21- 1-48. Both cry1Ab and gna transgenes had been inherited through selfing and crossing with their wild type as indicated from the F1 containing gna and cry1Ab as many as 48.4% and 47.4%, respectively. In six of the eight crosses, gna was inherited in a 3:1 ratio consistent with Mendelian inheritance of a single dominant locus, while in the remaining two crosses, gna was segregated in a 1:1 ratio. The presence of cry1Ab in F2 populations also showed a 3:1 segregation ratio in all crosses. In the F2 population derived from F1 plant containing cry1Ab and gna, both transgenes segregated in a 9:3:3:1 dihybrid segregation ratio. This study will add to the diversity of geneticsources for insect resistance and allow further use of these transgenic lines for pyramiding resistance to brown plant hopper and stem borer or  separately in rice breeding programs whenever the efficacy tests and biosafety requirements have been completed.
IDENTIFICATION AND MAPPING OF A GENE FOR RICE SLENDER KERNEL USING Oryza glumaepatula INTROGRESSION LINES Sobrizal Sobrizal; Atsushi Yoshimura
Indonesian Journal of Agricultural Science Vol 9, No 2 (2008): October 2008
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v9n2.2008.p55-59

Abstract

World demand for superior rice grain quality tends to increase. One of the  criteria of appearance quality of rice grain is grain shape. Rice consumers  exhibit wide preferences for grain shape, but most Indonesian rice consumers prefer long and slender grain. The objectives of this study were to identify and map a gene for rice slender kernel trait using Oryza  glumaepatula introgression lines with O. sativa cv. Taichung 65 genetic background. A segregation analysis of BC4F2 population derived from backcrosses of a donor parent O. glumaepatula into a recurrent parent Taichung 65 showed that the slender kernel was controlled by a single recessive gene. This new identified gene was designated as sk1 (slender kernel 1). Moreover, based on the RFLP analyses using 14 RFLP markers located on chromosomes 2, 8, 9, and 10 in which the O. glumaepatula chromosomal segments were retained in BC4F2 population, the sk1 was located between RFLP markers C679 and C560 on the long arm of chromosome 2, with map distances of 2.8 and 1.5 cM, respectively. The wild rice O. glumaepatula carried a recessive allele for slender kernel. This allele may be useful in breeding of rice with slender kernel types. In addition, the development of plant materials and RFLP map associated with slender kernel in this study is the preliminary works in the effort to isolate this important grain shape gene.
ROLE OF POLYAMINES IN INHIBITION OF ETHYLENE BIOSYNTHESIS AND THEIR EFFECTS ON RICE ANTHER CULTURE DEVELOPMENT Iswari S. Dewi; Bambang S. Purwoko
Indonesian Journal of Agricultural Science Vol 9, No 2 (2008): October 2008
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v9n2.2008.p60-67

Abstract

The polyamines such as putrescine, spermidine, and spermine were reported to increase green plant regeneration in rice anther culture. Low response of anther culture of rice sub-species indica may be improved with the addition of putrescine in the culture media. Four experiments were conducted to study the role of polyamines in inhibition of ethylene biosynthesis and their effects on rice anther culture development. Anthers of two subspecies of rice, indica (IR64, Krowal, Jatiluhur) and japonica (Taipei 309) were cultured onto media supplemented with putrescine (N6P) and without putrescine (N6). Youngpanicles containing the anthers at mid-to-late nucleate microspores were cold pretreated at 5 + 2°C and incubated in the dark for 8 days before the anthers were cultured. Resultsshowed that medium without putrescine produced an earlier senescence of indica rice anther than that of japonica. The addition of 10-3 M putrescine into the culture media inhibited ethylene biosynthesis as anther senescence delayed, increased the three polyamines contents, and decreased the ACC content as well as ACC oxydase activity in anther-derived calli. In the anther and anther-derived calli of subspecies indica, the totalpolyamines content was lower (10.14 nM g-1 anther and 8.48 nM g-1 calli) than that of subspecies japonica (12.61 nM g-1 anther and 10.16 nM g-1 calli), whereas the ethylene production was higher (32.31 nM g-1 anther and 2.48 nM g-1 calli) than the japonica (31.68 nM g-1 anther and 1.76 nM g-1 calli). This study suggests that application of 10-3 M putrescine in anther culture of rice subspecies indica improves androgenesis by inhibitingearly senescence of cultured anthers and enhancing embryo or callus formation from microspores.
THE SEGREGATION PATTERN OF INSECT RESISTANCE GENES IN THE PROGENIES AND CROSSES OF TRANSGENIC ROJOLELE RICE Satoto Satoto; Yuli Sulistyowati; Alex Hartana; Inez H. Slamet -Loedin
Indonesian Journal of Agricultural Science Vol 9, No 2 (2008): October 2008
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v9n2.2008.p35-43

Abstract

Successful application of genetic transformation technique, especially in developing rice variety resistant to brown plant hopper and stem borer, will depend on transgene being expressed and the gene inherited in a stable and predictable manner. This study aimed to analyse transgene segregation pattern of the progenies and the crosses of transgenic rice cv. Rojolele harboring cry1Ab and gna genes. The third generation (T2) of fivetransgenic Rojolele events containing gna and/or cry1Ab were evaluated for two generations to identify the homozygous lines and to study their inheritance. The homozygous lines were selected based on the result of PCR technique. The segregation patterns of gna and cry1Ab were studied in eight F2 populations derived from Rojolele x transgenic Rojolele homozygous for cry1Ab and or gna and their reciprocal crosses. Data  resulted from PCR of F2 population were analysed using a Chi Square test. The study obtained six homozygous lines for gna, namely A22- 1-32, A22-1-37, C72-1-9, F11-1-48, K21-1-39, K21-1-48, and two homozygous lines for cry1Ab, namely K21-1-39 and K21- 1-48. Both cry1Ab and gna transgenes had been inherited through selfing and crossing with their wild type as indicated from the F1 containing gna and cry1Ab as many as 48.4% and 47.4%, respectively. In six of the eight crosses, gna was inherited in a 3:1 ratio consistent with Mendelian inheritance of a single dominant locus, while in the remaining two crosses, gna was segregated in a 1:1 ratio. The presence of cry1Ab in F2 populations also showed a 3:1 segregation ratio in all crosses. In the F2 population derived from F1 plant containing cry1Ab and gna, both transgenes segregated in a 9:3:3:1 dihybrid segregation ratio. This study will add to the diversity of genetic sources for insect resistance and allow further use of these transgenic lines for pyramiding resistance to brown plant hopper and stem borer or  separately in rice breeding programs whenever the efficacy tests and biosafety requirements have been completed.
MYCOTOXIN CONTAMINATION ON CORN USED BY FEED MILLS IN INDONESIA Budi Tangendjaja; Sri Rachmawati; Elizabeth Wina
Indonesian Journal of Agricultural Science Vol 9, No 2 (2008): October 2008
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v9n2.2008.p68-76

Abstract

Mycotoxins which are secondary metabolites of fungi contaminate agricultural products such as corn and have deleterious effects on human and animal. The objective of this study was to evaluate the mycotoxin contamination on local and imported corn samples collected from different feed mills in Indonesia. Three hundred fifty six of corn samples (0.50 kg each) were sent by several feed mills to the Indonesian Research Institute for Animal Production during 2005-2006. The background information accompanied with each sample was country/province of origins, harvesting seasons, postharvest drying methods, moisture levels, grades, and varieties. The samples were analyzed for various mycotoxins, i.e aflatoxin (AFL), ochratoxin (OCRA), zearalenone (ZEN), fumonisin (FUM), deoxynivalenol (DON), and T2 toxin using commercial kits, except for AFL which was analysed using a kit developed by the Indonesian Research Center for Veterinary Science. The results showed that average AFL level in the contaminated corn originated from Indonesia was 59 µg kg-1, almost 7 times higher than that imported from the USA or Argentina. Among the types of mycotoxins detected, FUM was the highest with an average of 1193 µg kg-1, followed by DON, ZEN and OCRA at level of 324, 22 and 2 µg kg-1, respectively. Mycotoxin levels in the contaminated local corn samples varied depending on the province of origins as well as harvesting seasons, postharvest drying methods, and moisture contents. The least mycotoxin contaminations were found on corn originated from NorthSumatra and Lampung with the AFL levels were < 20 and < 50 µg kg-1, respectively, lower than those from East Java, Central Java and South Sulawesi (64-87 µg kg-1). Mycotoxin levels, however, were less affected by grading made by feed mills and corn varieties. It is indicated that AFL was the most important mycotoxin as far as for animal feeding concerned, as it contaminated almost 50% of local corn with the level of contamination above the Indonesian National Standard, i.e. 50 µg kg-1. The study suggests that postharvest methods of local corn must be improved to reduce mycotoxin contamination.
PROPERTIES AND MANAGEMENT IMPLICATIONS OF SOILS FORMED FROM VOLCANIC MATERIALS IN LEMBANG AREA, WEST JAVA Edi Yatno; Siti Zauyah
Indonesian Journal of Agricultural Science Vol 9, No 2 (2008): October 2008
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v9n2.2008.p44-54

Abstract

Soils formed from volcanic materials have a high potential for agricultural development, especially for horticultural crops, tea, and pine trees. Data on the characteristics of these soils are important for the management planning. Six representative soil profiles developed on andesitic volcanic ash and tuff in Lembang area, West Java were studied to determine the soil physical, chemical, and mineralogical properties, to study the relationship between the soil properties, and to classify the soils according to the Soil Taxonomy. The results indicated that all the soils had very deep (>150 cm) solum. In general, the volcanic ash soils were darker colored, more granular, more friable, less sticky and less plastic than the volcanic tuff soils. Physically, the ash soils had lower bulk density (0.44-0.73 mg m-3) and higher available water content (13-33%) than the tuff soils. Bulk density decreased with increasing allophane. Chemically, the ash soils had higher pHNaF (mostly > 10), higher organic carbon (4.3-6.8% in upper horizons), higher CEC (20- 44 cmolc kg-1), and higher P retention (> 85%) than the tuff soils. P retention logarithmically increased with increasing oxalate extractable Al and allophane. The sand fractions of the ash soils were dominated by hornblende, while the tuff soils were predominantly composed of opaque minerals. In the clay fractions, the ash soils were dominated by allophane, whereas the tuff soils showed high contents of gibbsite and metahalloysite. Soils developed on volcanic ash were classified as Thaptic Hapludands and Typic Melanudands, while soils formed from volcanic tuff were classified as Andic Dystrudepts. The low bulk density and friable consistency of the soils contributed to favorable soil tilth. However, high P retention and Al saturation in most soils are limiting factors for plant growth. Application of P fertilizers and liming coupled with efficient placement can be recommended to enhance P availability and reduce Al toxicity. Organic matter can be used to reduce Al toxicity. Soil conservation needs to be considered, especially in the steep slope areas.

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