26 Result(s)
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Article
F. Ahmad
Agriculture
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Article
Promising genetic resources for resistance to wheat streak mosaic virus and the wheat curl mite in wheat-Thinopyrum partial amphiploids and their derivatives
Wheat streak mosaic virus (WSMV), vectored by the wheat curl mite (WCM),Aceria tosichella Keifer, is one of the most destructive viral diseases of wheat found in many wheat producing areas of the world. Host resi...
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The extent of embryo and endosperm growth following interspecific hybridization between Cicer arietinum L. and related annual wild species
In vivo interspecific pollinations were performed and immature seed development investigated by histological methods in order to study crossability barrier(s) in Cicer L. species wide hybridization. Seven of the...
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Molecular cytogenetic evidence for a high level of chromosome pairing among different genomes in Triticum aestivum–Thinopyrum intermedium hybrids
Intergeneric hybrids (ABDJJsS genomes) were made between Triticum aestivum cv. Chinese Spring (CS) and Thinopyrum intermedium. Genomic in situ hybridization (GISH) using genomic DNA probes from Pseudoroegneria li...
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Random amplified polymorphic DNA (RAPD) analysis reveals genetic relationships among the annual Cicer species
Random amplified polymorphic DNA markers were used to distinguish between nine different Cicer taxa representing the cultivated chickpea and eight other related annual wild species. Of the 75 random10-mer primer...
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Article
Localization and activity of rRNA genes on fenugreek (Trigonella foenum-graecum L.) chromosomes by fluorescent in situ hybridization and silver staining
Fenugreek (Trigonella foenum-graecum L.), an annual legume crop grown mainly for seed at present, has the potential to be a high-quality forage crop in western Canada. A cytological survey of germplasm stored at...
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Molecular characterization of the genome composition of partial amphiploids derived from Triticum aestivum×Thinopyrum ponticum and T. aestivum×Th. intermedium as sources of resistance to wheat streak mosaic virus and its vector, Aceria tosichella
Wheat streak mosaic virus (WSMV), vectored by the wheat curl mite (WCM), is one of the most important viral diseases of wheat (Triticum aestivum) in the world. Genetic resistance to WSMV and the WCM does not exi...
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The fine structure of chickpea (Cicer arietinum L.) chromosomes as revealed by pachytene analysis
A standard pachytene karyotype of chickpea (Cicer arietinum L.) is presented for the first time. Individual pachytene chromosomes were identified and described in detail. An idiogram was prepared on the basis of ...
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Genetic relationships in the genus Cicer L. as revealed by polyacrylamide gel electrophoresis of seed storage proteins
Total seed storage protein of the cultivated chickpea, C. arietinum L., and eight other wild annual Cicer species (all 2n = 16) was separated and compared by sodium dodecyl sulphate polyacrylamide gel electrophor...
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Isozyme polymorphism and phylogenetic interpretations in the genus Cicer L.
Allozyme variation among 50 accessions representing the cultivated chickpea (Cicer arietinum L.) and eight wild annual Cicer species was scored and used to assess genetic diversity and phylogeny. Sixteen enzyme s...
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Production, morphology, and cytogenetics of Triticum aestivum (L.) Thell × Elymus scabrus (R. Br.) Love intergeneric hybrids obtained by in ovulo embryo culture
Intergeneric hybrids were produced between common wheat, Triticum aestivum (2n=6x=42, AABBDD), and an apomictic Triticeae species, Elymus scabrus (syn. Agropyron scabrum) (2n=6x=42, HHSSSS), the first successful ...
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Article
Unsaponifiable lipid constituents of ten indian seed oils
The unsaponifiable lipid constituents, hydrocarbons, triterpene alcohols and sterols of ten seed oils (Catharanthus roseus, Nymphaea nelumbo, Casuari-na equisetifolia, Lagerstroemia therolli, Prosopisjuliflora...
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Article
Cyclopropenoid fatty acids ingnetum scandens and itsterculia pallens seed oils
Seed oils ofGnetum scandens (Gnetaceae) andSterculia pattens (Sterculiaceae) were found to contain sterculic (28.57,6.97) and malvalic (11.27,3.87) acids, respectively. Gas Chromatographic analysis of silver nitr...
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Article
Addition of phthalimidonitrene to acetylenic fatty acid esters: Synthesis of long-chain 2-phthalimido-2H-azirines
Lead tetraacetate (LTA) oxidations of N-aminophthalimide in the presence of acetylenic fatty acid esters have resulted in the formation of corresponding 1H-azirines that spontaneously rearranged to give 2H-azi...
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Derivatization of keto fatty acids: VI. Synthesis, oxidation and mass spectrometry of dithiolanes
The synthesis of alkyl chain-substituted dithiolanes, bisdithiolane and disulfolanes from oxo acids and their decomposition to original oxo acids are described. Reactions of ethanedithiol with 2 oxo esters, me...
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Derivatization of keto fatty acids: V. Synthesis and characterization of 1,3-dioxolanes
The synthesis of substituted 1,3-dioxolanes from oxo fatty acid esters using 1,2-propanediol is described. This reagent, besides forming dioxolanes, also converts the methyl ester to the 2′-hydroxy propyl este...
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Article
Iodoazide addition to olefinic esters and their reaction with methanolic KOH
Addition of iodine azide to methyl 10-undecenoate (1), methyl oleate/elaidate (III,IV) and methyltrans-2-hexadecenoate (VII) yielded methyl 10-azido-11-iodoundecanoate (II, ∼ 100%), methylerythro/threo-9(10)-azid...
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Oxidative cyclization of 1-octadecanol and hydroxy fatty esters with lead tetraacetate
Oxidative cyclization of methyl 2-hydroxyoctadecanoate, methyl 10-hydroxyundecanoate and 1-octadecanol produced a good yield of the corresponding tetrahydrofuran (THF) derivatives characterized successively as...
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Synthesis of 2, 3 fatty aziridines
A new route for the synthesis of 2,3-aziridines is described. The reaction of methyl 2,3-dibromohexadecanoate (II) with ammonia at 0 C gave methyl 2-bromohexadec-2-enoate (III, ca. 93%). Compound III, on furth...
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Derivatization of keto fatty acids. III. synthesis of terminal thiazole and oxazole derivatives from α-bromoketones
The synthesis of alkyl chain substituted thiazole and oxazole derivatives is described. The reaction of 11-bromo-10-oxoundecanoic acid with thiourea and acetamide yielded terminally located thiazole and oxazol...
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Oxymercuration-demercuration of hydroxy acetylenic acids
Oxymercuration-demercurationof methyl 9-hydroxyoctadec-12-ynoate (I) and methyl 12-hydroxyoctadec-9-ynoate (II) gave 9-hydroxy-12-oxooctadecanoate (III) and 12-hydroxy-9-oxooctadecanoate (IV) in ca. 80% yields...
