Results 11 to 20 of about 125 (96)
International audienceAmaranthus palmeri S.Watson, de la famille des Amaranthaceae, est une adventice annuelle estivale dioïque (individus mâles et individus femelles distincts) à feuilles larges qui se caractérise par une croissance rapide, une très ...
Fried, Guillaume +4 more
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Partitioning Apomixis Components to Understand and Utilize Gametophytic Apomixis [PDF]
Frontiers in Plant Science, 2019 Apomixis is a method of reproduction to generate clonal seeds and offers tremendous potential to fix heterozygosity and hybrid vigor. The process of apomictic seed development is complex and comprises three distinct components, viz., apomeiosis (leading to formation of unreduced egg cell), parthenogenesis (development of embryo without fertilization ...
Pankaj Kaushal +6 more
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Theoretical and Applied Genetics, 2023 AbstractApomixis is an asexual mode of reproduction through seeds where progeny are clones of the mother plants. Naturally apomictic modes of reproduction are found in hundreds of plant genera distributed across more than 30 plant families, but are absent in major crop plants.
Alexander Mahlandt +2 more
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Genetic mechanisms of apomixis [PDF]
Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 2003 The introduction of apomixis to crops would allow desirable genotypes to be propagated while preventing undesirable gene flow, but so far there has been little success in transferring this trait from a natural apomict to another species.
Melissa, Spielman +2 more
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Apomixis: A Developmental Perspective
Annual Review of Plant Biology, 2003 The term apomixis encompasses a suite of processes whereby seeds form asexually in plants. In contrast to sexual reproduction, seedlings arising from apomixis retain the genotype of the maternal parent. The transfer of apomixis and its effective utilization in crop plants (where it is largely absent) has major advantages in agriculture.
Koltunow, Anna M., Grossniklaus, Ueli
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Apomixis and strategies to induce apomixis to preserve hybrid vigor for multiple generations [PDF]
GM Crops & Food, 2020 Hybrid seeds of several important crops with supreme qualities including yield, biotic and abiotic stress tolerance have been cultivated for decades. Thus far, a major challenge with hybrid seeds is that they do not have the ability to produce plants with the same qualities over subsequent generations.
Sajid Fiaz +5 more
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Reproductive behavior in maize-Tripsacum polyhaploid plants : implications for the transfer of apomixis into maize [PDF]
, 1996 L'expression de l'apomixie gamétophytique chez les graminées est limitée aux formes polyploïdes. Au cours de notre programme de transfert de l'apomixie de #Tripsacum$ tétraploïdes diplosporiques (2n = 4x = 72) au maïs (2n = 20) par rétrocroisements ...
Berthaud, Julien +4 more
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The evolution of apomixis [PDF]
Heredity, 1981 The selective forces responsible for the evolution of gametophytic apomixis in outbreeding plant populations are analysed in terms of a simple single gene model. In the absence of selection, apomixis inevitably becomes fixed in a population. This conclusion holds regardless of the dominance relations of the alleles specifying apomictic versus sexual ...
D R Marshall, A H D Brown
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Molecular Basis of Apomixis in Plants [PDF]
Genes, 2021 Sexual reproduction in plants is a complex, stringently regulated process that leads to the creation of diaspores for a new generation: sexual seeds [...]
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Acta Societatis Botanicorum Poloniae, 2014 In 1964, two new types of apogamy were described in ferns. The sporangia contain at the starting-point 16 spore mother cells and at the endingpoint 32 diplospores. On the one hand, the meiosis is replaced by a mitosis, on the other hand, the first meiotic division aborts and the restituition nucleus divides mitotically.
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