PMID- 33959234 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20210508 IS - 1993-0771 (Print) IS - 1993-078X (Electronic) IS - 1993-0771 (Linking) VI - 15 IP - 2 DP - 2021 TI - Cloning and physical localization of male-biased repetitive DNA sequences in Spinacia oleracea (Amaranthaceae). PG - 101-118 LID - 10.3897/CompCytogen.v15i2.63061 [doi] AB - Spinach (Spinacia oleracea Linnaeus, 1753) is an ideal material for studying molecular mechanisms of early-stage sex chromosome evolution in dioecious plants. Degenerate oligonucleotide-primed polymerase chain reaction (DOP-PCR) technique facilitates the retrotransposon-relevant studies by enriching specific repetitive DNA sequences from a micro-dissected single chromosome. We conducted genomic subtractive hybridization to screen sex-biased DNA sequences by using the DOP-PCR amplification products of micro-dissected spinach Y chromosome. The screening yielded 55 male-biased DNA sequences with 30 576 bp in length, of which, 32 DNA sequences (12 049 bp) contained repeat DNA sequences, including LTR/Copia, LTR/Gypsy, simple repeats, and DNA/CMC-EnSpm. Among these repetitive DNA sequences, four DNA sequences that contained a fragment of Ty3-gypsy retrotransposons (SP73, SP75, SP76, and SP77) were selected as fluorescence probes to hybridization on male and female spinach karyotypes. Fluorescence in situ hybridization (FISH) signals of SP73 and SP75 were captured mostly on the centromeres and their surrounding area for each homolog. Hybridization signals primarily appeared near the putative centromeres for each homologous chromosome pair by using SP76 and SP77 probes for FISH, and sporadic signals existed on the long arms. Results can be served as a basis to study the function of repetitive DNA sequences in sex chromosome evolution in spinach. CI - Jian Zhou, Shaojing Wang, Li'ang Yu, Ning Li, Shufen Li, Yulan Zhang, Ruiyun Qin, Wujun Gao, Chuanliang Deng. FAU - Zhou, Jian AU - Zhou J AD - College of Life Sciences, Henan Normal University, Xinxiang 453007, China Henan Normal University Xinxiang China. FAU - Wang, Shaojing AU - Wang S AD - College of Life Sciences, Henan Normal University, Xinxiang 453007, China Henan Normal University Xinxiang China. FAU - Yu, Li'ang AU - Yu L AD - Department of Plant Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA University of Illinois at Urbana-Champaign Urbana United States of America. FAU - Li, Ning AU - Li N AD - College of Life Sciences, Henan Normal University, Xinxiang 453007, China Henan Normal University Xinxiang China. FAU - Li, Shufen AU - Li S AD - College of Life Sciences, Henan Normal University, Xinxiang 453007, China Henan Normal University Xinxiang China. FAU - Zhang, Yulan AU - Zhang Y AD - College of Life Sciences, Henan Normal University, Xinxiang 453007, China Henan Normal University Xinxiang China. FAU - Qin, Ruiyun AU - Qin R AD - College of Life Sciences, Henan Normal University, Xinxiang 453007, China Henan Normal University Xinxiang China. FAU - Gao, Wujun AU - Gao W AD - College of Life Sciences, Henan Normal University, Xinxiang 453007, China Henan Normal University Xinxiang China. FAU - Deng, Chuanliang AU - Deng C AUID- ORCID: 0000-0001-6132-0145 AD - College of Life Sciences, Henan Normal University, Xinxiang 453007, China Henan Normal University Xinxiang China. LA - eng PT - Journal Article DEP - 20210423 PL - Bulgaria TA - Comp Cytogenet JT - Comparative cytogenetics JID - 101503807 PMC - PMC8087614 OTO - NOTNLM OT - FISH OT - Genomic subtraction hybridization OT - Retrotransposon OT - Sex chromosome evolution OT - Spinach EDAT- 2021/05/08 06:00 MHDA- 2021/05/08 06:01 PMCR- 2021/04/23 CRDT- 2021/05/07 07:11 PHST- 2021/01/13 00:00 [received] PHST- 2021/03/28 00:00 [accepted] PHST- 2021/05/07 07:11 [entrez] PHST- 2021/05/08 06:00 [pubmed] PHST- 2021/05/08 06:01 [medline] PHST- 2021/04/23 00:00 [pmc-release] AID - 63061 [pii] AID - 10.3897/CompCytogen.v15i2.63061 [doi] PST - epublish SO - Comp Cytogenet. 2021 Apr 23;15(2):101-118. doi: 10.3897/CompCytogen.v15i2.63061. eCollection 2021.