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INDONESIA
Journal of Tropical Crop Science
ISSN : 23560169     EISSN : 23560177     DOI : -
Core Subject : Agriculture,
Journal of Tropical Crop Science is an international journal publishing research related to tropical crops. Articles in the journal focus on in-vivo and in-vitro production and production environment, breeding, seed technology, physiology, postharvest, pest and pathology of cereals, vegetables, fruits, ornamentals, medicinal and plantation crops; soil, landscape, turf and agro ecology management under tropical conditions.
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Articles 4 Documents
Search results for , issue " Vol 4 No 1 (2017): Journal of Tropical Crop Science" : 4 Documents clear
Can We Produce True Seed of Shallot (TSS) from Small Size Shallot Sets? Palupi, Endah R.; Manik, Fatiani; Suhartanto, M Rahmad
Journal of Tropical Crop Science Vol 4 No 1 (2017): Journal of Tropical Crop Science
Publisher : Journal of Tropical Crop Science

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Abstract

The Indonesian government has been promoting the use of true seed of shallot (TSS) for shallot production due to its higher productivity potentials and greatly reduced risk of disease transfer. This research was conducted at Leuwikopo experimental station, Department of Agronomy and Horticulture, Bogor Agricultural University, West Java, Indonesia, in 2015. The aim of the research was to study TSS production from small size shallot sets “Bima Brebes”, an easy to flower shallot cultivar.  The trial was arranged in a completely randomized block design with two factors; BAP concentration i.e. 50, 100 150, 200 ppm as the first factor and the sizes of mother bulbs, i.e. small (3-4 g) and medium (5-10 g), as the second factor. The results showed that the vegetative growth of plants from the two bulb sizes were similar. TSS production and TSS quality from small size (3-4 g) bulbs was also comparable to that of medium size shallot set, except for 1000 seeds weight in which medium size mother bulb produced heavier 1000-seeds weight than that of small size shallot set. Therefore small size shallot set can potentially be useful for TSS production. 
Improvement of Shelf Life and Sensory Quality of Pummelos by Fruit Waxing and Wrapping Aji, Titistyas Gusti; Susanto, Slamet; Sukma, Dewi; Ardie, Sintho Wahyuning
Journal of Tropical Crop Science Vol 4 No 1 (2017): Journal of Tropical Crop Science
Publisher : Journal of Tropical Crop Science

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Abstract

The aims of this study were to evaluate the physical and chemical change of pummelo fruit during storage with waxing and wrapping, and to determine the effect of waxing and wrapping and their  its interaction in affecting shelf life of pummelo fruits. This research was arranged in a randomized complete block design with two factors and three replications. The first factor was waxing consisted of without waxing, 10% beeswax, 5% beeswax, and chitosan. The second factor was wrapping consisted of without wrapping and wrapping using either transparent yellow or white plastic wrap. Pummelo fruits experience weight loss, reduced total soluble solid (TSS), decrease in firmness and total acidity during 48 days of storage in room temperature. Waxing using beeswax or wrapping using plastic wraps significantly suppressed weight loss and maintained fruit firmness compared to those without waxing and wrapping. However, waxing and wrapping did not significantly affect the quality of pummelo fruits. Based on the fruit’s weight loss, firmness, and panelist preferences, 5% or 10% bees wax can be used as waxing. Both transparent yellow and white plastic wraps can be used to maintain fruit weight, firmness, and appearances during storage. 
Biodiversity Assessment of Foxtail Millet (Setaria italica L.) Genotypes Based on RAPD Marker ARDIE, Sintho Wahyuning; Khumaida, Nurul; Fauziah, Nurul; Yudiansyah, Yudiansyah
Journal of Tropical Crop Science Vol 4 No 1 (2017): Journal of Tropical Crop Science
Publisher : Journal of Tropical Crop Science

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Abstract

Foxtail millet (Setaria italica L.) is an important crop in areas where harsh environmental conditions limit crop productivity, including in high salinity and drought prone areas. In Indonesia millet is cultivated in certain areas; however, superior varieties are less developed in the country. The objective of this study was to analyze the genetic diversity among foxtail genotypes using RAPD markers. Genomic DNA of ten foxtail millet genotypes was amplified using 26 random primers through RAPD analysis. Of these primers, 22 produced reproducible amplicons and were polymorphic among the 10 foxtail millet genotypes. The number of polymorphic markers for each primer varied from 1 (primer E15) to 14 (primer M17). The amplified product size ranged from 120 to 2500 base pairs (bp). A dendrogram constructed based on the UPGMA clustering method put all genotypes in 5 distinct groups at 0.64 coefficient level. Diverse genotypes identified in this study can be used as potential parents in an efficient crop improvement program.
Evaluation of Progress Selection of F2 - F6 Population, A Cross between Two Lowland Tomato Genotypes Sautomo, Mohammad Wahyu; Syukur, Muhamad
Journal of Tropical Crop Science Vol 4 No 1 (2017): Journal of Tropical Crop Science
Publisher : Journal of Tropical Crop Science

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Abstract

One of the parameters that can be measured from the activities of selection  is  progress  selection.  The population of a plant which has been selected  is expected to  be good against a derivative of a  crop which was selected. The aim of this research   is to study the results of progress selection varieties superior of tomato plants down the generations in the population F2 005001 until F6 005001-4-1-12-3 with a standard tomato cultivar, “Ratna”. The result showed that the selected genotypes have shown improvements over the standard cutivar in terms of weight per fruit, fruit weight  per plant, the number   of fruits per plant, fruit thickness and the age of harvested plants in the population F2-005001 until F6 005001-4-1-12-3. The mean against the character being observed in the population F2 005001 until F6 005001-4-1-12-3 indicated that the result is better    if compared with both parents, P1 (SSH-5 ) and P2 (Intan) and the standard cultivar “Ratna”. The value of heritability a wider sense indicate its value being on each character of being selected, while the value of heritability in a more narrow sense showed a low value on every character. The value of progress against character selection of weights per fruit, the weight of the fruit per plant, the number of fruit per plant, thick flesh fruit and the age of harvest showed increased slow progress in a genotype F2 005001 followed by a period of rapid progress in a genotype F4 005001-4-1 and very slow in a genotype F6 005001-4-1-12-3.

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