Genetic Regulation of Meiotic Cross-Overs between Related Genomes inBrassica napusHaploids and Hybrids
| Autor: | Olivier Coriton, Anne-Marie Chèvre, Virginie Huteau, Hervé Monod, Eric Jenczewski, Stéphane Nicolas, Frédérique Eber, Martine Leflon |
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| Přispěvatelé: | Amélioration des Plantes et Biotechnologies Végétales (APBV), Institut National de la Recherche Agronomique (INRA)-Université de Rennes (UR)-AGROCAMPUS OUEST, Unité de biométrie et intelligence artificielle de Jouy (MIA-JOUY), Institut National de la Recherche Agronomique (INRA), Unité de recherche Génétique et amélioration des plantes (GAP), Institut National de la Recherche Agronomique (INRA)-Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-AGROCAMPUS OUEST, Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Unité de biométrie et intelligence artificielle de jouy |
| Rok vydání: | 2009 |
| Předmět: |
Genetic Markers
0106 biological sciences Genotype Genetic Linkage CHROMOSOME POLYPLOIDY Plant Science Biology 01 natural sciences Genetic recombination Chromosomes Plant BRASSICA NAPUS [SDV.GEN.GPL]Life Sciences [q-bio]/Genetics/Plants genetics 03 medical and health sciences Meiosis Microspore GENETIC MARKER Genetic variation GENETIQUE VEGETALE Research Articles 030304 developmental biology Hybrid Recombination Genetic 2. Zero hunger Genetics 0303 health sciences POLYPLOIDE food and beverages Karyotype Cell Biology MEIOSE GENETIC REGULATION Hybridization Genetic Ploidy Homologous recombination Genome Plant HAPLOIDY 010606 plant biology & botany |
| Zdroj: | The Plant cell The Plant cell, 2009, 21, pp.373-385. ⟨10.1105/tpc.108.062273⟩ The Plant cell, American Society of Plant Biologists (ASPB), 2009, 21, pp.373-385. ⟨10.1105/tpc.108.062273⟩ |
| ISSN: | 1532-298X 1040-4651 |
| DOI: | 10.1105/tpc.108.062273 |
| Popis: | Although the genetic regulation of recombination in allopolyploid species plays a pivotal role in evolution and plant breeding, it has received little recent attention, except in wheat (Triticum aestivum). PrBn is the main locus that determines the number of nonhomologous associations during meiosis of microspore cultured Brassica napus haploids (AC; 19 chromosomes). In this study, we examined the role played by PrBn in recombination. We generated two haploid × euploid populations using two B. napus haploids with differing PrBn (and interacting genes) activity. We analyzed molecular marker transmission in these two populations to compare genetic changes, which have arisen during meiosis. We found that cross-over number in these two genotypes was significantly different but that cross-overs between nonhomologous chromosomes showed roughly the same distribution pattern. We then examined genetic recombination along a pair of A chromosomes during meiosis of B. rapa × B. napus AAC and AACC hybrids that were produced with the same two B. napus genotypes. We observed significant genotypic variation in cross-over rates between the two AAC hybrids but no difference between the two AACC hybrids. Overall, our results show that PrBn changes the rate of recombination between nonhomologous chromosomes during meiosis of B. napus haploids and also affects homologous recombination with an effect that depends on plant karyotype. |
| Databáze: | OpenAIRE |
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