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  • 1
    Electronic Resource
    Electronic Resource
    A multi-nucleate male-sterile mutant of maize with gametophytic expression (1997)
    Springer
    Sexual plant reproduction 10 (1997), S. 22-26 
    Details
    ISSN: 1432-2145
    Keywords: Key words Maize ; Pollen ; Male sterility ; Gametophytic mutants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  In order to dissect the complex genetic system that controls pollen development, we have undertaken a program of transposon insertion mutagenesis, with the purpose of producing mutations in gametophytically acting genes that are important for this process. The present work reports the developmental cytology of one of the mutants isolated, gaMS-2 (gametophytic male sterile-2). A peculiar feature of the mutant grains was lack of differentiation between the vegetative and the generative nuclei, leading to alteration in number, conformation and placement of nuclei. At anthesis, the grains carrying the mutant allele are about 40% of the normal grain size, contain a very reduced amount of starch and exhibit various nuclear abnormalities.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004970050063
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Developmental expression of glutathione-S-transferase in maize and its possible connection with herbicide tolerance (1993)
    Springer
    Euphytica 67 (1993), S. 221-230 
    Details
    ISSN: 1573-5060
    Keywords: Zea mays ; glutathione-S-transferase ; glutathione ; herbicide tolerance ; gene expression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Crop improvement for tolerance to specific herbicides is an important breeding target, since molecules performing well with regard to environmental safety are frequently not completely selective for crops. The glutathione (GSH)/glutathione-S-transferase (GST) system is a general mechanism of detoxification that in higher plants may confer tolerance to some herbicides. GSH level and GST activity were measured in different maize inbred lines, in the absence or in the presence of EPTC (a thiocarbamate) and of Alachlor (a chloroacetanilide); a wide genetic variability was observed for these parameters, which appear to be involved in plant tolerance to herbicides. Isozyme analysis was performed on roots, leaves, scutellum, pollen, coleoptile, mesocotyl of the same inbreds: it revealed the presence of many GST forms in maize, showing high polymorphism; they are controlled by at least five genes, the expression of which is developmentally regulated in the different tissues analyzed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00040624
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  • 3
    Electronic Resource
    Electronic Resource
    Genetic dissection of herbicide tolerance in maize by molecular markers (1997)
    Springer
    Molecular breeding 3 (1997), S. 481-493 
    Details
    ISSN: 1572-9788
    Keywords: Alachlor ; herbicide tolerance ; maize ; RFLP ; SSR
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract In order to detect the genetic architecture of maize tolerance to Alachlor, a widely used chloroacetanilide, linkage analysis between the expression of the trait and allelic composition of molecular markers was performed. The experiment was carried out on a population of 142 recombinant inbred lines, developed starting from the F1 between two lines with different reactivity to the herbicide, and self-fertilized for 10 generations; the lines were typed by 48 RFLP markers and 66 microsatellites (SSR). Besides seedling tolerance, evaluated as proportion of normal (non-injured) plants after herbicide treatment, other minor components of tolerance were studied: seed germination ability, pollen germination and tube growth in the presence of the herbicide. The analysis, performed by three statistical methods, revealed the presence of factors controlling seedling tolerance on seven chromosomal regions. Five QTLs appeared to be involved in seed germination ability in the presence of Alachlor, four QTLs in pollen tolerance in terms of germination and four in tube growth under stress were detected. Three loci, on chromosomes 1, 7 and 10, explained most of the variation of seedling tolerance, thus being interesting candidate for marker-assisted selection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009631301428
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  • 4
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    Detection of genetic factors controlling pollen–style interaction in maize (1995)
    Springer Nature
    Details
    Publication Date: 1995-01-01
    Print ISSN: 0018-067X
    Electronic ISSN: 1365-2540
    Topics: Biology
    Published by Springer Nature
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