{"doi":"10.1002/9780470015902.a0002017.pub2","title":"Ploidy Variation in Plants","abstract":"<jats:title>Abstract</jats:title>\n          <jats:sec>\n            <jats:label/>\n            <jats:p>Evidence from genome sequences of many plant species indicate that all plants have had a cyclical history of doubling of chromosome numbers, followed by gene deletions back to a near diploid level. Recent cases of increases in genome copy number are generally considered to comprise ploidy variation. Ploidy variation involves changes in the number of whole sets of chromosomes. Aneuploid variation involves changes in the number of individual chromosomes. The two types of chromosomal changes have different consequences for gene expression patterns.</jats:p>\n          </jats:sec>\n          <jats:sec>\n            <jats:title>Key concepts:</jats:title>\n            <jats:p>\n              <jats:list list-type=\"bullet\">\n                <jats:list-item>\n                  <jats:p>An increase in whole genome chromosome sets is a recurring process in plant evolution followed by deletion of genes back to a near diploid level.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Recent genome doubling can consist of genomes from slightly diverged species and are referred to as allopolyploids.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Recent genome doubling within a species is referred to as autopolyploids.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Allopolyploids and autopolyploids have different genetic behaviours.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Cell size increases with the number of genomes present, as does gene expression in general.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Aneuploidy is the change in copy number of part of the genome.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Aneuploidy produces greater changes in gene expression than does ploidy variation.</jats:p>\n                </jats:list-item>\n              </jats:list>\n            </jats:p>\n          </jats:sec>","journal":"Encyclopedia of Life Sciences","year":2009,"id":674016,"datarank":0.16479184330021646,"base_score":1.0986122886681096,"endowment":1.0986122886681096,"self_citation_contribution":0.16479184330021646,"citation_network_contribution":0.0,"self_endowment_contribution":0.16479184330021646,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":2,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1761035,"name":"James A Birchler","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"resolved":true,"title":"Ploidy Variation in Plants","abstract":"<jats:title>Abstract</jats:title>\n          <jats:sec>\n            <jats:label/>\n            <jats:p>Evidence from genome sequences of many plant species indicate that all plants have had a cyclical history of doubling of chromosome numbers, followed by gene deletions back to a near diploid level. Recent cases of increases in genome copy number are generally considered to comprise ploidy variation. Ploidy variation involves changes in the number of whole sets of chromosomes. Aneuploid variation involves changes in the number of individual chromosomes. The two types of chromosomal changes have different consequences for gene expression patterns.</jats:p>\n          </jats:sec>\n          <jats:sec>\n            <jats:title>Key concepts:</jats:title>\n            <jats:p>\n              <jats:list list-type=\"bullet\">\n                <jats:list-item>\n                  <jats:p>An increase in whole genome chromosome sets is a recurring process in plant evolution followed by deletion of genes back to a near diploid level.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Recent genome doubling can consist of genomes from slightly diverged species and are referred to as allopolyploids.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Recent genome doubling within a species is referred to as autopolyploids.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Allopolyploids and autopolyploids have different genetic behaviours.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Cell size increases with the number of genomes present, as does gene expression in general.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Aneuploidy is the change in copy number of part of the genome.</jats:p>\n                </jats:list-item>\n                <jats:list-item>\n                  <jats:p>Aneuploidy produces greater changes in gene expression than does ploidy variation.</jats:p>\n                </jats:list-item>\n              </jats:list>\n            </jats:p>\n          </jats:sec>","is_dataset_classified":null,"base_score":0.0,"endowment":0.0,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"19162232","pmcid":null,"openalex_id":null,"authors":[],"funders":[],"total_grants":0,"fwci":null,"citation_percentile":null,"influential_citations":0,"citation_trend":[],"oa_status":"closed","license":"http://doi.wiley.com/10.1002/tdm_license_1.1","oa_locations":[{"url":"https://onlinelibrary.wiley.com/doi/pdf/10.1002/9780470015902.a0002017.pub2","host_type":"publisher"},{"url":"https://onlinelibrary.wiley.com/doi/full-xml/10.1002/9780470015902.a0002017.pub2","host_type":"publisher"}],"fields_of_study":[],"mesh_terms":[],"keywords":[],"sdg_mappings":[],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-08-16T15:14:41.706794Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}