Research Article

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Cotton (Gossypium spp) is one of the most economically important crops that provide the world’s most widely used natural fiber. Diseases such as Fusarium wilt and particularly Verticillium wilt seriously affect cotton production, and thus breeding for disease resistance is one of the most important goals of cotton breeding programs. Currently, potential exists to improve disease ... more

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Disease resistance; F2 population; Rice blast (Magnaporthe oryzae); Simple sequence repeat markers

Among 120 simple sequence repeat (SSR) markers, 23 polymorphic markers were used to identify the segregation ratio in 320 individuals of an F2 rice population derived from Pongsu Seribu 2, a resistant variety, and Mahsuri, a susceptible rice cultivar. For phenotypic study, the most virulent blast (Magnaporthe oryzae) pathotype, P7.2, was used in screening of F2 ... more

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Advanced backcross; Disease resistance; Oryza rufipogon; Quantitative trait loci; Rice

Advanced backcross families derived from Oryza sativa cv MR219/O. rufipogon IRGC105491 were utilized for identification of quantitative trait loci (QTL) for blast resistance using simple sequence repeat markers. Two hundred and sixty-one BC2F3 families were used to construct a linkage map, using 87 markers, which covered 2375.2 cM of 12 rice ... more

H.A. Rahim; M.A.R. Bhuiyan; L.S. Lim; K.K. Sabu; A. Saad; M. Azhar; R. Wickneswari
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Disease resistance; Inheritance study; Phakopsora pachyrhizi; Plant breeding; Resistance gene

Soybean rust (SBR), caused by the fungus Phakopsora pachyrhizi, has been reported in common bean (Phaseolus vulgaris L.) cultivars and elite lines that were infected under controlled and natural field conditions in South Africa, the United States, Argentina, and Brazil. Although SBR is currently not a top priority problem for the common bean crop, many bean breeders are ... more

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Chinese wild Vitis; Disease resistance; Grape germplasm; Powdery mildew; RAPD marker

The resistance of wild Vitis germplasm, including Chinese and American wild Vitis and Vitis vinifera cultivars, to powdery mildew (Uncinula necator Burr.) was evaluated for two consecutive years under natural conditions. Most of the Chinese and North American species displayed a resistant phenotype, whereas all of the European species were highly ... more

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3-glucanase gene; Arachis hypogaea L.; Disease resistance; Genetic transformation; peanut; Vector construction; β-1

Plant β-1,3-glucanases are commonly involved in disease resistance. This report describes the cloning and genetic transformation of a β-1,3-glucanase gene from peanut. The gene was isolated from both the genomic DNA and cDNA of peanut variety Huayu20 by polymerase chain reaction (PCR) and reverse transcription PCR (RT-PCR), respectively. The DNA sequence contained 1471 bp including two ... more

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Disease resistance; NBS-LRR; Pisum sativum; Resistance gene analogues (RGAs)

Pea (Pisum sativum) is one of the most cultivated le­gumes in the world, and its yield and seed quality are affected by a variety of pathogens. In plants, NBS-LRR (nucleotide binding site-leucine-rich repeat) is the main class of disease resistance genes. Using degenerate primers deduced from conserved motifs in the NBS domain of known resistance genes, we identified 10 NBS ... more

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Expression analysis; Gene duplication; Heat shock protein; Tomato

Heat shock protein 90 (Hsp90) is a protein produced by plants in response to adverse environmental stresses. In this study, we identified and analyzed Hsp90 gene family members using a bioinformatic method based on genomic data from tomato (Solanum lycopersicum L.). The results illustrated that tomato contains at least 7 Hsp90 genes distributed on 6 ... more

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Cadmium; Genetic variability; Solanum lycopersicum; Tomato

Due to increased global concern over the deleterious effects of toxic heavy metals in the environment, it has become necessary to develop plant genotypes that limit the uptake of heavy metals to aerial edible parts. To address this concern, we performed a glasshouse experiment to assess variations within tomato germplasm for cadmium (Cd) tolerance under control conditions and under ... more

M.M. Hussain; A. Saeed; A.A. Khan; S. Javid; B. Fatima
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Cold tolerance; ICE1 gene; Tomato; Transcription factor

The tomato plant (Solanum lycopersicum Mill.) is sensitive to cold, and low field temperatures can result in shortened growth periods and decreased crop yield. Transcription of CRT/DRE-binding factor (CBF) is regulated by INDUCER of CBF EXPRESSION1 (ICE1). CBF activates many downstream genes that confer cold tolerance on plants. ICE1 has been ... more

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