How To Use Apomict In A Sentence
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Furthermore, apomictic reproduction has been found in most polyploid Corollinae species, which, if transferred to cultivated beet, has the potential to improve the fixation of desired genotypes in breeding programmes.
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Unfortunately, no cultivated crop displays a sufficient degree of apomixis for practical application, and only a few crop plants have wild relatives that are near-obligate apomicts.
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Rational Review
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Using two highly variable microsatellites (heterozygosity H = 0.615-0.616), we show that this species is an apomict with rare sexual reproduction events that account for 0.5% of seeds pollinated in the wild.
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A major scientific goal in the last decade has been to isolate genes specifically expressed in apomictic genotypes.
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Gametophytic apomicts differ from sexually reproducing plants in that they produce unreduced embryo sacs.
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Another type of apomictic development has been reported to occur in the gymnosperm Cupressus dupreziana, where embryos develop from unreduced pollen grains.
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Expression of four oleopollenin genes in eight individuals of the predominantly apomictic species Boechera holboellii.
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Breeding crop plants resistant to such plagues would be much quicker, and cheaper, once the apomictic supergene has been identified.
Day of the Dandelion
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This primary function of pollen is a constraint that suffices to explain why apomictic grasses make pollen.
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First, like many other members of the rose family (including apples), it is apomictic.
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Parthenogenetic weevils are apomictic.
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However, this seems unlikely since, as far as we know, no apomictic taxa of Primulaceae have been detected.
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Maternal apomictic embryos develop from a somatic cell within the ovule or from an unreduced embryo sac derived from the megaspore mother cell (diplospory).
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In a highly inbred or apomictic group, every individual would be a species according to the biological species concept.
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The occurrence of apomixis in the Pomoideæ, and the high frequency of diploid seedlings, 23 out of 39, in a family of pears we raised from crossing the diploid variety Fertility with the triploid variety Beurre Diel, suggested that they may have been apomictically, or in part apomictically, reproduced.
Mark Bazer: A Grapple a Day...Won't do Much for You
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It will be argued that the success of apomicts in the long run depends critically on their ability to cross with sexual relatives and that this enables apomixis to survive much longer time periods than generally thought.
Dandelions, acquired characteristics, and creationism - The Panda's Thumb
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However, some tetraploid lines are facultatively apomictic and an individual plant may set seed both apomictically and sexually.
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Because of its mode of reproduction and unusually large nuclear genome, it is speculated that its success as a weed could be attributed, in part, to its behaviour as an autopolyploid apomict.
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They are all native to the subtropical and temperate regions of South America, and sexual diploids and apomictic polyploids are known for almost all of them.
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It is noteworthy that according to the studies of Illg, M. brasiliensis may be apomictic, although pollinator-dependent; i.e. apomixis is triggered by pollen-tube development.
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Genetic sequences causally associated with the apomictic trait are provided which can be used to convert any sexual plant to an apomict.
Day of the Dandelion
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The occurrence of apomixis in the Pomoideæ, and the high frequency of diploid seedlings, 23 out of 39, in a family of pears we raised from crossing the diploid variety Fertility with the triploid variety Beurre Diel, suggested that they may have been apomictically, or in part apomictically, reproduced.
Mark Bazer: A Grapple a Day...Won't do Much for You
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The gene(s) controlling apomictic reproduction in Tripsacum have been assigned to the long arm of chromosome 16.
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Such plants are very rare in other apomictic plant species.
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Genetic and molecular mapping studies based on the analysis of offspring from apomictic by sexual crosses have been carried out on multiple species reproducing by gametophytic apomixis.
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The cluster analysis based on AFLP data of two different types showed that: the polymorphism between apomictic reproduction type and sexual type are little, the genetic relationship is very intimate.
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Progeny tests employing molecular markers allow the identification of individuals originated by sexual means among the offspring of a facultative apomict.
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The resulting hybrids often are apomictic and locally distributed.
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The results show that early fertilization leads to the formation of apomictic embryos while fertilization at anthesis favours the formation of sexually derived embryos.
