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Li J, Guo J, Wei C, Meng Y, Wang X, Yu P, Yang L, Liang Y, Guo S, Yuan J. A set of sampling, preparation, and staining techniques for studying meiosis in cucumber. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2022; 319:111245. [PMID: 35487654 DOI: 10.1016/j.plantsci.2022.111245] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/01/2022] [Accepted: 03/03/2022] [Indexed: 06/14/2023]
Abstract
The development of genetic and genomic resources for biological studies in cucumber has experienced an unprecedented boom in recent years. To investigate the function of putative meiotic genes and germplasm in breeding programs, an accurate cytogenetic characterization is required. Cytological methods and reference to investigate meiosis in cucumber are limited at present. Here we provide a set of cytological techniques that have been adapted for the study of meiosis in cucumber. The meiotic stages can be identified with high precision using hierarchical criteria from developing buds, undisturbed meiocytes, and freshly stained chromosomes. A meiotic cytological atlas of all stages is presented as a reference for identifying particular stages and for comparison of meiosis between normal and mutant plants. We performed a comparative analysis of the distribution of cytoplasmic organelles between cucumber and Arabidopsis, and we described a highly nonsynchronous condensation of chromosome parts during diplotene. A simplified fluorescence in situ hybridization (FISH) protocol, using robustly spread chromosomes, were developed. In addition, we designed a single oligonucleotide probe for 5S rDNA to use in karyotyping and monitoring of homologous chromosome pairing, which will make FISH analysis of 5S rDNA easier and more economical.
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Affiliation(s)
- Junhua Li
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China.
| | - Jinjin Guo
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Chenchen Wei
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Yao Meng
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Xiaoduan Wang
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Panpan Yu
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Lin Yang
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Yi Liang
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China
| | - Siyi Guo
- State Key Laboratory of Crop Stress Adaptation and Improvement, School of Life Sciences, Henan University, Kaifeng 475004, China
| | - Jinhong Yuan
- College of Life Sciences, Henan Normal University, Xinxiang 453007, China.
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