PMID- 11069714 OWN - NLM STAT- MEDLINE DCOM- 20010202 LR - 20190906 IS - 0960-7412 (Print) IS - 0960-7412 (Linking) VI - 24 IP - 3 DP - 2000 Nov TI - Construction of male and female PAC genomic libraries suitable for identification of Y-chromosome-specific clones from the liverwort, Marchantia polymorpha. PG - 421-8 AB - Unlike higher plants, the dioecious liverwort, Marchantia polymorpha, has uniquely small sex chromosomes, with X chromosomes present only in female gametophytes and Y chromosomes only in male gametophytes. We have constructed respective genomic libraries for male and female plantlets using a P1-derived artificial chromosome (pCYPAC2). With an average insert size of approximately 90 kb, each PAC library is estimated to cover the entire genome with a probability of more than 99.9%. Male-specific PAC clones were screened for by differential hybridization using male and female genomic DNAs as separate probes. Seventy male-specific PAC clones were identified. The male specificity of one of the clones, pMM4G7, was verified by Southern hybridization and PCR analysis. This clone was indeed located on the Y chromosome as verified by fluorescence in situ hybridization (FISH). This result shows that the Y chromosome contains unique sequences that are not present either on the X chromosome or any of the autosomes. Thus, the respective male and female libraries for M. polymorpha offer an opportunity to identify key genes involved in the process of sex differentiation and this unique system of sex determination. FAU - Okada, S AU - Okada S AD - Laboratory of Plant Molecular Biology, Division of Integrated Life Science, Graduate School of Biostudies, Kyoto University, Kyoto 606-8502, Japan. FAU - Fujisawa, M AU - Fujisawa M FAU - Sone, T AU - Sone T FAU - Nakayama, S AU - Nakayama S FAU - Nishiyama, R AU - Nishiyama R FAU - Takenaka, M AU - Takenaka M FAU - Yamaoka, S AU - Yamaoka S FAU - Sakaida, M AU - Sakaida M FAU - Kono, K AU - Kono K FAU - Takahama, M AU - Takahama M FAU - Yamato, K T AU - Yamato KT FAU - Fukuzawa, H AU - Fukuzawa H FAU - Brennicke, A AU - Brennicke A FAU - Ohyama, K AU - Ohyama K LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - Plant J JT - The Plant journal : for cell and molecular biology JID - 9207397 RN - 0 (DNA Primers) SB - IM MH - Base Sequence MH - Chromosomes/genetics MH - DNA Primers/genetics MH - Genome, Plant MH - Genomic Library MH - In Situ Hybridization, Fluorescence MH - Nucleic Acid Hybridization MH - Plants/*genetics MH - Polymerase Chain Reaction EDAT- 2000/11/09 11:00 MHDA- 2001/03/03 10:01 CRDT- 2000/11/09 11:00 PHST- 2000/11/09 11:00 [pubmed] PHST- 2001/03/03 10:01 [medline] PHST- 2000/11/09 11:00 [entrez] AID - tpj882 [pii] AID - 10.1046/j.1365-313x.2000.00882.x [doi] PST - ppublish SO - Plant J. 2000 Nov;24(3):421-8. doi: 10.1046/j.1365-313x.2000.00882.x.