منابع مشابه
Direct Expression of Incompatibility in Curvilinear Systems
With this note, we would like present a method to compute the incompatibility operator in any system of curvilinear coordinates/components. The procedure is independent of the metric in the sense that the expression can be expressed by means of the basis vectors only, which are first defined as normal and tangent to the domain boundary and then extended to the whole domain. It is in some sense ...
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In a multidatabase system schematic con icts between two objects are usually of inter est only when the objects have some semantic a nity In this paper we try to reconcile the two perspectives We rst de ne the concept of semantic proximity and provide a semantic taxonomy We then enumerate and classify the schematic and data con icts We discuss possible semantic similarities between two objects ...
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In a multidatabase system schematic con icts between two objects are usually of inter est only when the objects have some semantic a nity In this paper we try to reconcile the two perspectives We rst de ne the concept of semantic proximity and provide a semantic taxonomy We then enumerate and classify the schematic and data con icts We discuss possible semantic similarities between two objects ...
متن کاملSelf-incompatibility systems as bioassays for mutagens
Many flowering plants are unable to set seeds with their own pollen because a system known as gametophytic self-incompatibility is operating. The basis of this system is a single multiallelic locus S, and if the S allele carried by a pollen grain matches one of the two S alleles carried in the style, as it is certain to do upon self-pollination, then pollen tube growth is inhibited. Should one ...
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Expectations for the time scale and structure of allelic genealogies in finite populations are formed under three models of sporophytic self-incompatibility. The models differ in the dominance interactions among the alleles that determine the self-incompatibility phenotype: In the SSIcod model, alleles act codominantly in both pollen and style, in the SSIdom model, alleles form a dominance hier...
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ژورنال
عنوان ژورنال: Crop Science
سال: 2002
ISSN: 0011-183X,1435-0653
DOI: 10.2135/cropsci2002.1800