GISH identification of meiotic chromosome organization and segregation in F_1 intergeneric hybrid between Dendranthema horaimontana and Nipponanthemum nipponicum(Abstracts of the International Conference on "Evolutionary Botany of Certain Plant-Groups of
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概要
- 論文の詳細を見る
The maternal D. horaimontana (2n=18) and the paternal N. nipponicum (2n=18) were artificially crossed and produced F_1 hybrid plants. GISH was applied on meiotic chromosomes in pollen mother cells (PMCs) of the F1 hybrid to study chromosome organization and segregation of the two parents. Uni- Bi- and multivalents were observed during diakinasis showed only single terminal chiasmata. Multivalents were observed during meiosis-I and showed non-homologous pairing occurred between homoeologous chromosomes among the same haploid chromosome set and between chromosomes of the two parents. The most common meiotic abnormalities were those related to the irregular segregation of univalent chromosomes, characterized by laggards, fragments and multiple bridges in anaphase-telophase I and telophase II. In general, these chromosomes gave rise to micronuclei during telophase that remained until the second meiosis. GISH displayed that all chromosomal bridges were related to N. nipponicum genome. Tetrads showed different sizes of nuclei and elimination of one of the parental genome from others. The genome of D. horaimontana and that of N. nipponicum in the in pollen grains of their intergeneric F_1 hybrid were differentially stained and fluoresced as distinct domains of two different colors following GISH.
- 財団法人染色体学会の論文
著者
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Abd El-Twab
Laboratory of Plant Genetics and Breeding Science, Department of Agriculture, Faculty of Agriculture
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Kondo Katsuhiko
Laboratory of Plant Genetics and Breeding Science, Department of Agriculture, Faculty of Agriculture
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Kondo Katsuhiko
Laboratory Of Plant Chromosome And Gene Stock Faculty Of Science Hiroshima University
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Abd El-twab
Laboratory Of Plant Chromosome And Gene Stock Faculty Of Science Hiroshima University
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