Environmental conditions and isozyme polymorphism in <i>Chenopodium album</i> L.

Mouemar, A. Al; Gasquez, Jacques

doi:10.1111/j.1365-3180.1983.tb00532.x

Cited by 38 publications

(23 citation statements)

References 9 publications

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“…The same results have been found for predominantly autogamous triazine-resistant weeds, such as Amaranthus retroflexus (Warwick & Black, 1986). Within an allogamous species, Chenopodium album, it has been shown by Al Mouemar & Gasquez (1983) that the rate of phenotypic polymorphism is very high in gardens, reduced in treated fields and reduced to only one phenotype in the triazine-resistant populations. Recent results have shown that within an allogamous weed (Brassica rapa), the triazine-resistant populations have only a slightly reduced genetic variability (Warwick & Black, 1993 (Chauvel, 1991).…”

Section: +____+____+___-+----+----+----+-----+----+----±supporting

confidence: 72%

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Relationships between genetic polymorphism and herbicide resistance within Alopecurus myosuroides Huds.

Chauvel¹,

Gasquez²

1994

Heredity

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The genetic structure of a gramineous weed (Alopecurus myosuroides Huds.) was investigated by an electrophoretic survey of seven enzyme systems on 19 susceptible and herbicide-resistant populations collected in different countries. The results indicate that Alopecurus myosuroides is an allogamous self-incompatible plant with a high level of genetic polymorphism (60 per cent of loci polymorphic, average heterozygosity= 0.21) and with a very low genetic differentiation among populations (Nei's distances less than 0.06) from wide geographical origins. A comparison of expected and observed levels of heterozygosity indicates no significant departure from random mating. Furthermore, there is no evidence of differences between resistant and susceptible populations in any genetic parameter. This is the first example of no change in genetic structure within resistant weed populations after herbicide selection.

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confidence: 72%

“…For example, selection for triazine resistance can lead to a significant decrease in polymorphism (Al Mouemar & Gasquez, 1983;Warwick & Black, 1986). Similar results have been found within resistant insect populations (Georghiou, 1990).…”

Section: Atopecurus Myosuroides Hudson (Black-grass or Slender Foxtaisupporting

confidence: 71%

Relationships between genetic polymorphism and herbicide resistance within Alopecurus myosuroides Huds.

Chauvel¹,

Gasquez²

1994

Heredity

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“…The effect of environmental factors on morpho-agronomic characteristics was estimated by Pearson's correlation using SPSS for Windows 14. Patterns or zymograms were produced on the basis of numbers and of relative position of bands (Mouemer and Gasquez 1983) and the variable types (in respect of number and position of bands) were considered as different patterns in the zymogram.…”

Section: Discussionmentioning

confidence: 99%

Assessing morphological and isozyme variation of jackfruit (Artocarpus heterophyllus Lam.) in Bangladesh

2007

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A farmers' participatory survey was carried out in five different agroecosystems of Bangladesh to obtain information on the genetic diversity, consumers preferences for fruit quality and to assess the data to select potentially superior genotypes of jackfruit (Artocarpus heterophyllus Lam.). A wide variation in morpho-agronomic characters was identified from farmers' information and also from laboratory analyses. Multivariate analysis of the data produced four discrete groups, represented by trees from different agroecological zones and soil types. Characteristics such as weight; length; diameter; girth of fruits; number of bulbs per fruit; percentage of pulp; percentage of rachis (core); and percentage of rind (peel) were found to be poorly correlated with environmental factors indicating that these characters may be genetically controlled. Other characters, such as seed weight, bulb weight, and brix (%) were found to be affected by environmental and genetic factors. Isozyme analysis of 50 accessions confirmed results obtained from field studies of morpho-agronomic characters. Ten potentially superior types were selected on the basis of yield, fruiting season, flesh colour, texture, sweetness, and farmers' preference for recommendation to producers.

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“…Phenotypic polymorphism for each enzyme and plant lot was estimated using the Pi index utilized by Kahler et al . (1980), Al Mouemar & Gasquez (1983) and Warwick & Black (1986) :…”

Section: Methodsmentioning

confidence: 99%

Correlation of isoenzyme polymorphism and Bayoud-disease resistance in date palm cultivars and progeny

et al. 1992

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Seedlings of date palm (Phoenix dactylifera L .), obtained from seven cultivars crossed with two males, were analyzed by polyacrylamide gel electrophoresis for esterase (EST), glutamate oxaloacetate transaminase (GOT), endopeptidase (ENP) and alcohol dehydrogenase (ADH) polymorphisms . Eleven, eight, five and two phenotypes were revealed for the enzymes tested, respectively . Seedlings of F, populations derived from Bayoud (Fusarium)-resistant and low fruit quality cultivars were characterized by . a high electrophoretic polymorphism, when compared with progenies of Bayoud-susceptible and high fruit quality cultivars . In almost all cases, the most frequent electrophoretic phenotypes scored for each enzyme in different F, populations, were similar to those of the corresponding parent cultivars . Heterozygous phenotypes have been found for, at least, 3 loci ; Got-2, Est-1 and Enp, indicating that such loci could be used to screen for hybrid seedlings . The expected Mendelian segregation of allozymes has been observed for these 3 loci, in many F, populations . It seems that progenies of Bayoud-resistant cultivars are characterized by a high level of electrophoretic polymorphism . The estimation of this index and the search for genetic linkage with segregating allozymes, may be biochemical criteria useful as an aid in distinguishing date palm seedling populations derived from Bayoud-resistant cultivars and suitable for breeding programs .

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Environmental conditions and isozyme polymorphism in Chenopodium album L.

Cited by 38 publications

References 9 publications

Relationships between genetic polymorphism and herbicide resistance within Alopecurus myosuroides Huds.

Relationships between genetic polymorphism and herbicide resistance within Alopecurus myosuroides Huds.

Assessing morphological and isozyme variation of jackfruit (Artocarpus heterophyllus Lam.) in Bangladesh

Correlation of isoenzyme polymorphism and Bayoud-disease resistance in date palm cultivars and progeny

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