1,720,979 research outputs found
Uji Ketahanan Galur-galur Harapan Padi terhadap Penyakit Hawar Daun Bakteri (Xanthomonas oryzae pv. oryzae) Ras III, IV, dan VIII
No full text<p>Resistance Test of Promising Rice Lines Against Bacterial Leaf Blight (Xanthomonas oryzae pv. oryzae) Race III, IV, and VIII. Siti Yuriyah, Dwinita W. Utami, and Ida Hanarida. Development of new superior rice varieties resistant to bacterial leaf blight (BLB) has been conducted through utilizing of a wide rice germplasm, from crossing between IR64 and Oryza rufipogon. The aim of this study is to get promising rice lines that resistant to BLB race III, IV, and VIII. The experiments were conducted at greenhouse and Laboratory of Molecular Biology, ICABIOGRAD Bogor, using of 13 promising rice lines that have different levels of resistance to inoculum from pure cultures of BLB race III, IV and VIII. Of these 13 rice lines, six lines showed resistance to race III (Bio5-AC-Blas/BLB-03, Bio62-AC-Blas/BLB-03, Bio111-BC-PIR7, Bio129-BC-WBC, Bio148-Mamol, and Bio154-Mamol-Dro), one line showed resistance to race IV (Bio154-Mamol-Dro), and one line showed resistance to race VIII (Bio5-AC-Blas/BLB-03), with severity rate 1.8 to 8.1%. Of these improve lines Bio5-AC-Blas/BLB-3 and Bio 111-BCPir- 7, were released as new rice varieties, namely Inpari HDB and Inpari Blas, respectively.</p><p> </p><p><strong>Abstrak</strong></p><p>Perakitan varietas padi unggul baru tahan terhadap hawar daun bakteri (HDB) terus dilakukan melalui pemanfaatan sumber daya genetik yang luas. Saat ini telah dirakit galur-galur unggul yang berasal dari persilangan IR64 dan padi liar Rupifogon. Penelitian ini bertujuan untuk mengevaluasi ketahanan galur harapan padi terhadap penyakit HDB dari Ras III, IV, dan VIII. Percobaan dilakukan di rumah kaca dan Laboratorium Kelti Biologi Molekuler, BB Biogen, Bogor. Materi genetik yang digunakan adalah 13 galur harapan padi dan biakan murni dari Ras III, IV, dan VIII. Metode inokulasi dengan pengguntingan dan skoring ketahanan dilakukan sesuai dengan sistem penilaian dari Yashitola et al. (1997). Dari 13 galur padi harapan yang diuji, diperoleh enam galur tahan terhadap Ras III (Bio5-AC-Blas/BLB-03, Bio62-AC-Blas/BLB-03, Bio111- BC-PIR7, Bio129-BC-WBC, Bio148-Mamol-Dro, dan Bio154-Mamol-Dro), satu galur tahan terhadap Ras IV (Bio154-Mamol-Dro) dan satu galur tahan terhadap Ras VIII (Bio5-AC-Blas/BLB-03), dengan tingkat keparahan sebesar 1,8-8,1%. Dalam perkembangannya, dua dari galur harapan, yaitu galur Bio5-AC-Blas/BLB-03 dan Bio111-BC-Pir-7 disetujui untuk dilepas sebagai varietas Inpari HDB dan Inpari Blas.</p></jats:p
Keragaman Genetik 96 Aksesi Plasma Nutfah Padi Berdasarkan 30 Marka SSR Terpaut Gen Pengatur Waktu Pembungaan (HD Genes)
No full text<p>Genetic Diversity of 96 Accession of Rice Germplasm<br />Using 30 SSR Markers Linked to Heading Date Genes (HD<br />Genes). Dwinita W. Utami, Sutoro, Nurul Hidayatun,<br />Andari Risliawati, and Ida Hanarida. Rice with early<br />maturity is one of an important genetic resources in rice<br />germplasm collection. Characterization and identification of<br />genetic diversity is an important issue for plant variety protection.<br />Molecular identification by microsatellite markers<br />using Genetic Analyzer enables resolve of this issue. The<br />objective of this research is to identify the genetic diversity of<br />96 rice accessions based on their specific DNA fingerprint<br />using microsatellite markers. A total of 96 accessions consisting<br />of a diverse variety of maturity classification were<br />genotyped with 30 SSR markers linked to HD genes which<br />spread out in 12 chromosomes of rice geneome. The total<br />297 alleles were detected indicated the level of marker<br />informativeness. RM5607 generated 7 allele with the size<br />range from 103 to 197 and the highest PIC at 0.90. RM3571<br />(linked to HD12 gene) has a significant value associated with<br />varieties which have early maturity trait. Clustering analysis<br />showed the cluster based on Sub Species genome background<br />and on early maturity trait.</p></jats:p
Spektrum Ketahanan Galur Haploid Ganda Turunan IR64 dan Oryza rufipogon yang mengandung QTL Ketahanan terhadap Penyakit Blas (Pir)
No full text<p>Resistance Spectrum of Double Haploid Lines Derived<br />from IR64 and Wild Rice Species, Oryza rufipogon<br />Contained the Blast Resistance QTL (Pir). Dwinita W.<br />Utami, A. Dinar Ambarwati, Aniversari Apriana, Atmitri<br />Sisharmini, Ida Hanarida, Didier Tharreau, and Santosa.<br />This study was initiated to determine the spectrum resistance<br />of the candidate durable blast resistance variety contained<br />the QTL (quantitative trait locus), Pir1 and 2. This QTL<br />was mapped on chromosome 2 detected using the advanced<br />backcross population (BC5) from the wild rice species<br />Oryza rufipogon to IR64. Pir (1 and 2) also established<br />on double haploid (DH) population derived from the selected<br />lines of BC2F3 population, progenies from the same<br />parents. The DH lines were developed to speed up the fixation<br />process of the recessive alleles in the selected lines.<br />Near isogenic lines with different blast resistance genes and<br />combination were used in this study comparing to the DH<br />population on their resistance spectrum using the known<br />avr gene isolates both on green house and field screening.<br />The determination of the resistance spectrum will useful on<br />the prediction of durability of blast resistance gene in DH<br />population. The results of spectrum resistance test in green<br />house and field showed that Pir1and Pir2 segregated on 1 : 1<br />proportion related with specific respond to blast avr gene<br />PH14 and CM28 resistance. Pir1 was identic to Pi33 or Pi25<br />and Pir2 to Pitq5 on spectrum resistance.<br /><br /></p></jats:p
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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