Cytological origination of the first found allotriploid tree peony, Paeonia × lemoinei ‘Oukan’ (AAB), reveled by molecular karyotype comparation

Zhong, Yuan; Du, Ming-jie; Ji, Run-ze; Cheng, Fang-yun

doi:10.1016/j.scienta.2023.112563

Scientia Horticulturae

2024

DOI: 10.1016/j.scienta.2023.112563

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Cytological origination of the first found allotriploid tree peony, Paeonia × lemoinei ‘Oukan’ (AAB), reveled by molecular karyotype comparation

Yuan Zhong,

Ming-jie Du,

Run-ze Ji

et al.

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2024

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Cited by 1 publication

References 28 publications

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Characteristics and Cytological Analysis of Several Novel Allopolyploids and Aneuploids between Brassica oleracea and Raphanus sativus

Hu,

Fang,

Wei

et al. 2024

IJMS

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Polyploids are essential in plant evolution and species formation, providing a rich genetic reservoir and increasing species diversity. Complex polyploids with higher ploidy levels often have a dosage effect on the phenotype, which can be highly detrimental to gametes, making them rare. In this study, offspring plants resulting from an autoallotetraploid (RRRC) derived from the interspecific hybridization between allotetraploid Raphanobrassica (RRCC, 2n = 36) and diploid radish (RR, 2n = 18) were obtained. Fluorescence in situ hybridization (FISH) using C-genome-specific repeats as probes revealed two main genome configurations in these offspring plants: RRRCC (2n = 43, 44, 45) and RRRRCC (2n = 54, 55), showing more complex genome configurations and higher ploidy levels compared to the parental plants. These offspring plants exhibited extensive variation in phenotypic characteristics, including leaf type and flower type and color, as well as seed and pollen fertility. Analysis of chromosome behavior showed that homoeologous chromosome pairing events are widely observed at the diakinesis stage in the pollen mother cells (PMCs) of these allopolyploids, with a range of 58.73% to 78.33%. Moreover, the unreduced C subgenome at meiosis anaphase II in PMCs was observed, which provides compelling evidence for the formation of complex allopolyploid offspring. These complex allopolyploids serve as valuable genetic resources for further analysis and contribute to our understanding of the mechanisms underlying the formation of complex allopolyploids.

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Characteristics and Cytological Analysis of Several Novel Allopolyploids and Aneuploids between Brassica oleracea and Raphanus sativus

Hu,

Fang,

Wei

et al. 2024

IJMS

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Cytological origination of the first found allotriploid tree peony, Paeonia × lemoinei ‘Oukan’ (AAB), reveled by molecular karyotype comparation

Cited by 1 publication

References 28 publications

Characteristics and Cytological Analysis of Several Novel Allopolyploids and Aneuploids between Brassica oleracea and Raphanus sativus

Characteristics and Cytological Analysis of Several Novel Allopolyploids and Aneuploids between Brassica oleracea and Raphanus sativus

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