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All Journal HAYATI Journal of Biosciences Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Forum Pasca Sarjana Zuriat Biofarm : Jurnal Ilmiah Pertanian

JAJAH KOSWARA

Unknown Affiliation

Author-ID : 299870

Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Economics, Econometrics & Finance Education

Published : 6 Documents Claim Missing Document

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Articles

Tolerance of Several Peanut Cultivars against Drought Stress AHMAD RIDUAN; HAJRIAL ASWIDINNOOR; JAJAH KOSWARA; SUDARSONO SUDARSONO
HAYATI Journal of Biosciences Vol. 12 No. 1 (2005): March 2005
Publisher : Bogor Agricultural University, Indonesia

The objectives of this experiments were to determine the effects of drought stress initiated at vegetative growth stage on yield of peanut, to evaluate the tolerance of six peanut cultivars against drought stress, and to determine their leaf prolin and total sugar content. One group of peanut plants were grown in plastic pots and subjected to stress condition during the period of 15-45 days (Experiment I) or 15-80 days (Experiment II) by watering them only in every 4-7 days and were harvested at days 75 (Experiment I) or at maturity (Experiment II). The other group was grown optimally in plastic pot up to harvest period. Leaf prolin content was determined at 12 (before stress), 30 (after three periods of stress), 47 (after six periods of stress), and 64 days in Experiment I and only after six periods of drought stress in Experiment II. Results indicated that drought stress that was initiated at vegetative growth stage reduced plant height, branches number, shoot and root dry weight, and peanut yield. Sensitivity index calculated based on peanut yield showed that peanut cv. Jerapah and Singa were a medium tolerance while Gajah, Kelinci, Macan, and Simpai were sensitive against drought stress. Higher increased in leaf proline content after drought stress was observed in peanut cv. Jerapah and Singa, while less increased was observed in peanut cv. Gajah, Kelinci, Macan and Simpai. Total leaf sugar content of peanut cv. Jerapah, Gajah, Macan and Simpai decreased under drought stress while that of Singa and Kelinci were the same as that under optimal condition. The ability to increase leaf proline content and maintain total leaf sugar content under drought stress could be used as indicators of drought tolerance in peanut cultivars.

Pewarisan Ketahanan Cabai (Capsicum annuum L.) terhadap Antraknosa yang Disebabkan oleh Colletotrichum acutatum Muhamad Syukur; Sriani Sujiprihati; Jajah Koswara; , Widodo
Indonesian Journal of Agronomy Vol. 35 No. 2 (2007): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Anthracnose is one of the most destructive disease of pepper in Indonesia. Colletotrichum gloeosporioides and C. acutatum have been reported to be predominant species in pepper fields of Asian countries including Indonesia. Inheritance of resistance to anthracnose caused by C. acutatum was studied in Capsicum annuum populations derived from a cross between resistant line 'C-15' and susceptible line 'C-2'. Twenty green pepper fruits from each plant were inoculated with PYK 04 isolate. This experiment showed that there was no maternal effect based on t-test of F1 and F1R. Segregation of resistance and susceptibility in the F2 fitted a normal distrubution, indicated that resistance was controlled by polygenic genes. Eight effective factors were responsible for anthracnose resistance. The degree of dominance was partially recessive. Gene effects for resistance to anthracnose were additive and dominance. Additive variance was larger than dominance variance. Broad-sense heritability values were high but narrow-sense heritability values were medium. Selection for resistance to C. acutatum on pepper breeding programme should be conducted on later generation. Key words : Inheritance, anthracnose, resistance, pepper, Colletotrichum acutatum

QTL Mapping of Yield, Yield Components, and Morphological Traits in Rice (Oryza sativa L.) Using SSR Marker Untung Susanto; Hajrial Aswidinnoor; Jajah Koswara; Asep Setiawan; Vitaliano Lopena; Lina Torizo; Virk S. Parminder
Indonesian Journal of Agronomy Vol. 36 No. 3 (2008): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

The experiment was aimed at identifying QTL (quantitative trait loci) controlling ten traits of yield, yield component and plant morphology of rice based on BC1F1 of IR75862-206-2-8-3-B-B-B//IR64 mapping population consisted of 115 plants. It was arranged in Completely Randomized Design with three replicates. Ninety three SSR markers spread across the twelve rice chromosomes were used to map the QTL. These markers were mostly segregated according to Mendel Law except for fourteen markers. There were eleven QTL detected in eight traits, i.e., heading date, flag leaf length, plant height, panicle length, panicle weight, seed set, weight of 100 grains, and grain weight per plant, meaning that one or two QTL were detected in each trait. These QTL were located at chromosome 2, 3, 4, 6, 11, and 12. Some QTL were located at the same chromosome even at the same location indicating the close association of the traits. It also indicated that there were common QTL which were found across genetic background and specific QTL which were found at specific genetic background. Further study was prospective for the molecular marker application in rice improvement. Key words: QTL, agronomic traits, SSR, rice

The Effect of Phosphorus Fertilization and Variety on The Growth and Production of Soybean (Glycine m a (L.) Merr) Under Saturated Soil Culture Munif Ghulamahdi; Fred Rumawas; Joedojono Wiroatmodjo; Jajah Koswara
Forum Pasca Sarjana Vol. 14 No. 1 (1991): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1179.526 KB)

The objective of this expaiment was to study the effect of phosphorus fertilization on the growth and production of Americana and Lokon under saturated soil culture. The experiment was conducted at the Cikarawang Experimental Station, IPB, on a Latosol, from November 1988 until April 1989. Soybean yield did not respond to the phosphorus application, and maybe due to improved soil P availability under saturated condition. Leaf P concentrations at 9 weeks were sufficient (0.303 to 0.357%) for all levels of treatment. Active nodule growth was longer under saturated soil culture than conventional irrigation. Maximum active nodule growth under conventional culture was reached at 6 weeks, but under saturated soil culture was still increasing between 6 to 9 weeks from 0.175 to 0.342 g/plant for Americana and from 0.162 to 0.260 g/plant for Lokon. Increase of active nodule dry weight was followed by increase of leaf N concentration between 6 to 9 weeks from 3.366 to 3.674% for Americana, and from 3.382 to 3.695% for Lokon. Americana was more tolerant than Lokon to saturated soil culture. Number of Tied pods, 100- sads weight, and seed dry weight/plot of Americana were bigger than Lokon.

PENDUGAAN MODEL GENETIK DAN HERITABILITAS KARAKTER KETAHANAN TERHADAP PENYAKIT BULAI PADA JAGUNG Muhammad Azrai; Hajrial Aswidinnoor; Jajah Koswara; Memen Surahman
Zuriat Vol 16, No 2 (2005)
Publisher : Breeding Science Society of Indonesia (BSSI) / PERIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/zuriat.v16i2.6764

Model genetik ketahanan terhadap penyakit bulai pada jagung yang disebabkan oleh Peronosclerospora maydis telah diestimasi pada progeni yang berasal dari persilangan antara galur resisten Mr10 dan Nei9008, serta galur rentan CML161. Tujuh generasi dari tiap-tiap persilangan (tetua P1 dan P2, F1, F2, F3, BC1P1, dan BC1P2) telah ditanam di Kebun Percobaan Cikeumeuh-Bogor. Percobaan ditata mengikuti rancangan petak terbagi dengan dua ulangan. Materi genetik dievaluasi ketahanannya terhadap penyakit bulai dengan menggunakan teknik tanaman baris penyebar. Uji skala gabungan digunakan untuk menentukan model genetik yang sesuai. Uji-t pada level 5% dan 1% mengindikasikan bahwa komponen genetik aditif [d], dominan [h] dan interaksi aditif × aditif [i] berperan penting untuk karakter ketahanan terhadap penyakit bulai pada jagung. Nilai komponen genetik aditif dan dominan yang bertanda sama dengan interaksinya pada pasangan persilangan Mr10 × CML161 menunjukkan adanya interaksi gen yang bersifat komplementer epistasis, sedangkan pada pasangan persilangan Nei9008 × CML161, komponen genetik aditif dan dominan berlawanan tanda dengan interaksinya menunjukkan adanya interaksi gen yang bersifat duplikat epistasis. Nilai heritabilitas dalam arti luas tergolong tinggi, sedangkan heritabilitas dalam arti sempit tergolong sedang.

INTERAKSI GENETIK X LINGKUNGAN UNTUK KETAHANAN CABAI ( Capsicum annuum L.) TERHADAP ANTRAKNOSA YANG DISEBABKAN OLEH Colletotrichum acutatum Muhammad Syukur; Sriani Sujiprihati; Jajah Koswara; Widodo .
Biofarm Jurnal Ilmiah Pertanian Vol 13, No 9 (2010): BIOFARM JURNAL ILMIAH PERTANIAN
Publisher : Universitas Pekalongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31941/biofarm.v13i9.275

Appearance of a plant is determined by genetic factors, environmental factors and interactions between them. The genetic x environment interactions become an important concern for breeders, in addition to genetic factors. Purpose of this study was to examine the genetic x environment interactions for resistance of pepper to anthracnose. Materials used were 16 hybrids that were planted at three locations. Complete randomized block design (RCBD) was used with three replications. Replicates nested within location. Twenty of hot pepper that has been worn but is still green from each replication was inoculated with C. acutatum, PYK 04 isolate. Disease incidence was observed five days after inoculation. The results showed that the genotype x location interaction was significant different to resistance resistance caused by Colletotrichum acutatum PYK 04 isolate. Pepper genotypes stable in anthracnose resistant character in three selection environments was IPB CH3, IPB CH6, and IPB CH25. The genotypes were suitable for selection environment Ciherang, Leuwikopo and Tajur. Genotype IPB CH50 and IPB CH51 were suitable for selection environment Tajur. Imperial genotypes was suitable for the environment selection Ciherang. IPB CH5 and IPB CH4 CH5 were suitable for Lewikopo environment.Keywords:genetic x environmental interaction, anthracnose, resistance, pepper, Colletotrichum acutatum

Co-Authors , Widodo AHMAD RIDUAN Asep Setiawan Fred Rumawas HAJRIAL ASWIDINNOOR Joedojono Wiroatmodjo Lina Torizo Memen Surahman Muhamad Syukur Muhammad Azrai Muhammad Syukur MUNIF GHULAMAHDI Sriani Sujiprihati Sudarsono Untung Susanto Virk S. Parminder Vitaliano Lopena Yundari, Yundari

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