PMID- 37176933 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20230515 IS - 2223-7747 (Print) IS - 2223-7747 (Electronic) IS - 2223-7747 (Linking) VI - 12 IP - 9 DP - 2023 May 4 TI - Identification, Characterization, and Cytological Analysis of Several Unexpected Hybrids Derived from Reciprocal Crosses between Raphanobrassica and Its Diploid Parents. LID - 10.3390/plants12091875 [doi] LID - 1875 AB - Interspecific hybridization and accompanying backcross between crops and relatives have been recognized as a powerful method to broaden genetic diversity and transfer desirable adaptive traits. Crosses between radish (Raphanus sativus, RR, 2n = 18) and Brassica oleracea (CC, 2n = 18), which formed allotetraploid Raphanobrassica (RRCC, 2n = 36), initiated the construction of resynthetic allopolyploids. However, these progenies from the backcrosses between Raphanobrassica and the two diploid parents have not been well deciphered. Herein, thousands of backcrosses using both Raphanobrassica and the two diploid parents as pollen donors were employed. Several hybrids with expected (2n = 27) and unexpected chromosome numbers (2n = 26 and 2n = 36) were obtained. Fluorescence in situ hybridization (FISH) analysis with R-genome-specific sequences as probes demonstrated that the genome structures of the two expected hybrids were RRC and CCR, and the genome structures of the three unexpected hybrids were RRRC, CCCR, and RRC' (harbouring an incomplete C genome). The unexpected hybrids with extra R or C genomes showed similar phenotypic characteristics to their expected hybrids. FISH analysis with C-genome-specific sequences as probes demonstrated that the unexpected allotetraploid hybrids exhibited significantly more intergenomic chromosome pairings than the expected hybrids. The expected and unexpected hybrids provide not only novel germplasm resources for the breeding of radish and B. oleracea but also very important genetic material for genome dosage analysis. FAU - Yu, Jie AU - Yu J AUID- ORCID: 0000-0002-0463-9704 AD - School of Life Sciences, Guizhou Normal University, Guiyang 550025, China. FAU - Lei, Shaolin AU - Lei S AD - Guizhou Institute of Oil Crops, Guizhou Academy of Agricultural Sciences, Guiyang 550009, China. FAU - Fang, Shiting AU - Fang S AD - School of Life Sciences, Guizhou Normal University, Guiyang 550025, China. FAU - Tai, Niufang AU - Tai N AD - School of Life Sciences, Guizhou Normal University, Guiyang 550025, China. FAU - Yu, Wei AU - Yu W AD - School of Life Sciences, Guizhou Normal University, Guiyang 550025, China. FAU - Yang, Ziwei AU - Yang Z AD - School of Life Sciences, Guizhou Normal University, Guiyang 550025, China. FAU - Gu, Lei AU - Gu L AD - School of Life Sciences, Guizhou Normal University, Guiyang 550025, China. FAU - Wang, Hongcheng AU - Wang H AD - School of Life Sciences, Guizhou Normal University, Guiyang 550025, China. FAU - Du, Xuye AU - Du X AUID- ORCID: 0000-0003-4328-0236 AD - School of Life Sciences, Guizhou Normal University, Guiyang 550025, China. FAU - Zhu, Bin AU - Zhu B AD - School of Life Sciences, Guizhou Normal University, Guiyang 550025, China. FAU - Cai, Mengxian AU - Cai M AD - School of Life Sciences, Guizhou Normal University, Guiyang 550025, China. LA - eng GR - ZK[2023]YB272/Guizhou Provincial Basic Research Program (Natural Science)/ GR - [2022]ZD031/Guizhou Provincial Key Technology R&D Program/ GR - 001/the earmarked fund for GZMARS-Rapeseed/ PT - Journal Article DEP - 20230504 PL - Switzerland TA - Plants (Basel) JT - Plants (Basel, Switzerland) JID - 101596181 PMC - PMC10181067 OTO - NOTNLM OT - Brassica oleracea OT - chromosome behaviour OT - interspecific hybridization OT - radish OT - unexpected hybrids COIS- The authors declare no conflict of interest. EDAT- 2023/05/13 15:13 MHDA- 2023/05/13 15:14 PMCR- 2023/05/04 CRDT- 2023/05/13 01:35 PHST- 2023/04/08 00:00 [received] PHST- 2023/04/28 00:00 [revised] PHST- 2023/05/01 00:00 [accepted] PHST- 2023/05/13 15:14 [medline] PHST- 2023/05/13 15:13 [pubmed] PHST- 2023/05/13 01:35 [entrez] PHST- 2023/05/04 00:00 [pmc-release] AID - plants12091875 [pii] AID - plants-12-01875 [pii] AID - 10.3390/plants12091875 [doi] PST - epublish SO - Plants (Basel). 2023 May 4;12(9):1875. doi: 10.3390/plants12091875.