Genetic variation and evolution of Polaskia chichipe (Cactaceae) under domestication in the Tehuacan Valley, central Mexico
Polaskia chichipe is a columnar cactus under artificial selection in central Mexico because of its edible fruits. Our study explored the effect of human manipulation on levels and distribution of genetic variation in wild, silviculturally managed and cultivated sympatric populations. Total genetic v...
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| Veröffentlicht in: | Molecular ecology 2005-05, Vol.14 (6), p.1603-1611 |
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| creator | Otero-Arnaiz, A Casas, A Hamrick, J.L Cruse-Sanders, J |
| description | Polaskia chichipe is a columnar cactus under artificial selection in central Mexico because of its edible fruits. Our study explored the effect of human manipulation on levels and distribution of genetic variation in wild, silviculturally managed and cultivated sympatric populations. Total genetic variation, estimated in nine populations with five microsatellite loci, was HT = 0.658 ± 0.026 SE, which was mainly distributed within populations (HS = 0.646) with low differentiation among them (FST = 0.015). Fixation index (FIS) in all populations was positive, indicating a deficit of heterozygous individuals with respect to Hardy–Weinberg expectations. When populations were pooled by management type, the highest expected heterozygosity (HE = 0.631 ± 0.031 SE) and the lowest fixation index (FIS = 0.07) were observed in wild populations, followed by cultivated populations (HE = 0.56 ± 0.03 SE, FIS = 0.14), whereas the lowest variation was found in silviculturally managed populations (HE = 0.51 ± 0.05 SE, FIS = 0.17). Low differentiation among populations under different management types (FST 0.005, P |
| doi_str_mv | 10.1111/j.1365-294X.2005.02494.x |
| format | Article |
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Our study explored the effect of human manipulation on levels and distribution of genetic variation in wild, silviculturally managed and cultivated sympatric populations. Total genetic variation, estimated in nine populations with five microsatellite loci, was HT = 0.658 ± 0.026 SE, which was mainly distributed within populations (HS = 0.646) with low differentiation among them (FST = 0.015). Fixation index (FIS) in all populations was positive, indicating a deficit of heterozygous individuals with respect to Hardy–Weinberg expectations. When populations were pooled by management type, the highest expected heterozygosity (HE = 0.631 ± 0.031 SE) and the lowest fixation index (FIS = 0.07) were observed in wild populations, followed by cultivated populations (HE = 0.56 ± 0.03 SE, FIS = 0.14), whereas the lowest variation was found in silviculturally managed populations (HE = 0.51 ± 0.05 SE, FIS = 0.17). Low differentiation among populations under different management types (FST 0.005, P < 0.04) was observed. A pattern of migration among neighbouring populations, suggested from isolation by distance (r2 = 0.314, P < 0.01), may have contributed to homogenizing populations and counteracting the effects of artificial selection. P. chichipe, used and managed for at least 700 generations, shows morphological differentiation, changes in breeding system and seed germination patterns associated with human management, with only slight genetic differences detected by neutral markers.</description><identifier>ISSN: 0962-1083</identifier><identifier>EISSN: 1365-294X</identifier><identifier>DOI: 10.1111/j.1365-294X.2005.02494.x</identifier><identifier>PMID: 15836636</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Science Ltd</publisher><subject>alleles ; alleles per locus ; Biological Evolution ; Biological variation ; Cactaceae ; Cactaceae - anatomy & histology ; Cactaceae - genetics ; Cactaceae - physiology ; Cactus ; Cluster Analysis ; columnar cacti ; crop evolution ; Crops, Agricultural - genetics ; dinucleotide repeats ; domestication ; Evolution ; fruit crops ; fruit growing ; Gene Frequency ; Genetic diversity ; genetic markers ; genetic resources ; genetic structure ; Genetic Variation ; Genetics, Population ; Genotype ; Geography ; heterozygosity ; loci ; Mexico ; microsatellite repeats ; Microsatellite Repeats - genetics ; microsatellites ; Polaskia chichipe ; Population Dynamics ; Reproduction - physiology ; Selection, Genetic ; wild relatives</subject><ispartof>Molecular ecology, 2005-05, Vol.14 (6), p.1603-1611</ispartof><rights>2005 Blackwell Publishing Ltd</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4874-1c084d70127f60069a9209f069bf52edcc3c22ce68baf1dd078c57f2f94881993</citedby><cites>FETCH-LOGICAL-c4874-1c084d70127f60069a9209f069bf52edcc3c22ce68baf1dd078c57f2f94881993</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1111%2Fj.1365-294X.2005.02494.x$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1111%2Fj.1365-294X.2005.02494.x$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27923,27924,45573,45574</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/15836636$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Otero-Arnaiz, A</creatorcontrib><creatorcontrib>Casas, A</creatorcontrib><creatorcontrib>Hamrick, J.L</creatorcontrib><creatorcontrib>Cruse-Sanders, J</creatorcontrib><title>Genetic variation and evolution of Polaskia chichipe (Cactaceae) under domestication in the Tehuacan Valley, central Mexico</title><title>Molecular ecology</title><addtitle>Mol Ecol</addtitle><description>Polaskia chichipe is a columnar cactus under artificial selection in central Mexico because of its edible fruits. Our study explored the effect of human manipulation on levels and distribution of genetic variation in wild, silviculturally managed and cultivated sympatric populations. Total genetic variation, estimated in nine populations with five microsatellite loci, was HT = 0.658 ± 0.026 SE, which was mainly distributed within populations (HS = 0.646) with low differentiation among them (FST = 0.015). Fixation index (FIS) in all populations was positive, indicating a deficit of heterozygous individuals with respect to Hardy–Weinberg expectations. When populations were pooled by management type, the highest expected heterozygosity (HE = 0.631 ± 0.031 SE) and the lowest fixation index (FIS = 0.07) were observed in wild populations, followed by cultivated populations (HE = 0.56 ± 0.03 SE, FIS = 0.14), whereas the lowest variation was found in silviculturally managed populations (HE = 0.51 ± 0.05 SE, FIS = 0.17). Low differentiation among populations under different management types (FST 0.005, P < 0.04) was observed. A pattern of migration among neighbouring populations, suggested from isolation by distance (r2 = 0.314, P < 0.01), may have contributed to homogenizing populations and counteracting the effects of artificial selection. P. chichipe, used and managed for at least 700 generations, shows morphological differentiation, changes in breeding system and seed germination patterns associated with human management, with only slight genetic differences detected by neutral markers.</description><subject>alleles</subject><subject>alleles per locus</subject><subject>Biological Evolution</subject><subject>Biological variation</subject><subject>Cactaceae</subject><subject>Cactaceae - anatomy & histology</subject><subject>Cactaceae - genetics</subject><subject>Cactaceae - physiology</subject><subject>Cactus</subject><subject>Cluster Analysis</subject><subject>columnar cacti</subject><subject>crop evolution</subject><subject>Crops, Agricultural - genetics</subject><subject>dinucleotide repeats</subject><subject>domestication</subject><subject>Evolution</subject><subject>fruit crops</subject><subject>fruit growing</subject><subject>Gene Frequency</subject><subject>Genetic diversity</subject><subject>genetic markers</subject><subject>genetic resources</subject><subject>genetic structure</subject><subject>Genetic Variation</subject><subject>Genetics, Population</subject><subject>Genotype</subject><subject>Geography</subject><subject>heterozygosity</subject><subject>loci</subject><subject>Mexico</subject><subject>microsatellite repeats</subject><subject>Microsatellite Repeats - genetics</subject><subject>microsatellites</subject><subject>Polaskia chichipe</subject><subject>Population Dynamics</subject><subject>Reproduction - physiology</subject><subject>Selection, Genetic</subject><subject>wild relatives</subject><issn>0962-1083</issn><issn>1365-294X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNqNkl9v0zAUxSMEYmXwFcDiAYFEiv_EsfPAAyprQdoAiW7szXKda-oujYudjE58eZylGhIvYFnytfw7R74-zjJE8JSk8WYzJazkOa2KyynFmE8xLapiur-XTe4O7mcTXJU0J1iyo-xRjBuMCaOcP8yOCJesLFk5yX4toIXOGXStg9Od8y3SbY3g2jf97c5b9MU3Ol45jczapbkD9HKmTacNaHiF-raGgGq_hZh8RgvXom4NaAnrXhvdogvdNHDzGhlou6AbdAZ7Z_zj7IHVTYQnh_U4O5-fLGcf8tPPi4-zd6e5KaQocmKwLGqBCRW2xLisdEVxZVOxspxCbQwzlBoo5UpbUtdYSMOFpbYqpCRVxY6zF6PvLvgffbqm2rpooGl0C76PqhSCc07_DRLBGcGcJfD5X-DG96FNTShKsMC4YEWC5AiZ4GMMYNUuuK0ON4pgNcSoNmpISw1pqSFGdRuj2ifp04N_v9pC_Ud4yC0Bb0fgp0sP-9_G6uxkNlRJn496FzvY3-l1uEqvwQRX3z4tlFws59X8_aW6SPyzkbfaK_09uKjOv9L0nzBJzQoq2G_VMsPj</recordid><startdate>200505</startdate><enddate>200505</enddate><creator>Otero-Arnaiz, A</creator><creator>Casas, A</creator><creator>Hamrick, J.L</creator><creator>Cruse-Sanders, J</creator><general>Blackwell Science Ltd</general><general>Blackwell Publishing Ltd</general><scope>FBQ</scope><scope>BSCLL</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SN</scope><scope>7SS</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>M7N</scope><scope>P64</scope><scope>RC3</scope><scope>7X8</scope></search><sort><creationdate>200505</creationdate><title>Genetic variation and evolution of Polaskia chichipe (Cactaceae) under domestication in the Tehuacan Valley, central Mexico</title><author>Otero-Arnaiz, A ; Casas, A ; Hamrick, J.L ; Cruse-Sanders, J</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4874-1c084d70127f60069a9209f069bf52edcc3c22ce68baf1dd078c57f2f94881993</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>alleles</topic><topic>alleles per locus</topic><topic>Biological Evolution</topic><topic>Biological variation</topic><topic>Cactaceae</topic><topic>Cactaceae - anatomy & histology</topic><topic>Cactaceae - genetics</topic><topic>Cactaceae - physiology</topic><topic>Cactus</topic><topic>Cluster Analysis</topic><topic>columnar cacti</topic><topic>crop evolution</topic><topic>Crops, Agricultural - genetics</topic><topic>dinucleotide repeats</topic><topic>domestication</topic><topic>Evolution</topic><topic>fruit crops</topic><topic>fruit growing</topic><topic>Gene Frequency</topic><topic>Genetic diversity</topic><topic>genetic markers</topic><topic>genetic resources</topic><topic>genetic structure</topic><topic>Genetic Variation</topic><topic>Genetics, Population</topic><topic>Genotype</topic><topic>Geography</topic><topic>heterozygosity</topic><topic>loci</topic><topic>Mexico</topic><topic>microsatellite repeats</topic><topic>Microsatellite Repeats - genetics</topic><topic>microsatellites</topic><topic>Polaskia chichipe</topic><topic>Population Dynamics</topic><topic>Reproduction - physiology</topic><topic>Selection, Genetic</topic><topic>wild relatives</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Otero-Arnaiz, A</creatorcontrib><creatorcontrib>Casas, A</creatorcontrib><creatorcontrib>Hamrick, J.L</creatorcontrib><creatorcontrib>Cruse-Sanders, J</creatorcontrib><collection>AGRIS</collection><collection>Istex</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>Molecular ecology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Otero-Arnaiz, A</au><au>Casas, A</au><au>Hamrick, J.L</au><au>Cruse-Sanders, J</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Genetic variation and evolution of Polaskia chichipe (Cactaceae) under domestication in the Tehuacan Valley, central Mexico</atitle><jtitle>Molecular ecology</jtitle><addtitle>Mol Ecol</addtitle><date>2005-05</date><risdate>2005</risdate><volume>14</volume><issue>6</issue><spage>1603</spage><epage>1611</epage><pages>1603-1611</pages><issn>0962-1083</issn><eissn>1365-294X</eissn><abstract>Polaskia chichipe is a columnar cactus under artificial selection in central Mexico because of its edible fruits. Our study explored the effect of human manipulation on levels and distribution of genetic variation in wild, silviculturally managed and cultivated sympatric populations. Total genetic variation, estimated in nine populations with five microsatellite loci, was HT = 0.658 ± 0.026 SE, which was mainly distributed within populations (HS = 0.646) with low differentiation among them (FST = 0.015). Fixation index (FIS) in all populations was positive, indicating a deficit of heterozygous individuals with respect to Hardy–Weinberg expectations. When populations were pooled by management type, the highest expected heterozygosity (HE = 0.631 ± 0.031 SE) and the lowest fixation index (FIS = 0.07) were observed in wild populations, followed by cultivated populations (HE = 0.56 ± 0.03 SE, FIS = 0.14), whereas the lowest variation was found in silviculturally managed populations (HE = 0.51 ± 0.05 SE, FIS = 0.17). Low differentiation among populations under different management types (FST 0.005, P < 0.04) was observed. A pattern of migration among neighbouring populations, suggested from isolation by distance (r2 = 0.314, P < 0.01), may have contributed to homogenizing populations and counteracting the effects of artificial selection. P. chichipe, used and managed for at least 700 generations, shows morphological differentiation, changes in breeding system and seed germination patterns associated with human management, with only slight genetic differences detected by neutral markers.</abstract><cop>Oxford, UK</cop><pub>Blackwell Science Ltd</pub><pmid>15836636</pmid><doi>10.1111/j.1365-294X.2005.02494.x</doi><tpages>9</tpages></addata></record> |
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| subjects | alleles alleles per locus Biological Evolution Biological variation Cactaceae Cactaceae - anatomy & histology Cactaceae - genetics Cactaceae - physiology Cactus Cluster Analysis columnar cacti crop evolution Crops, Agricultural - genetics dinucleotide repeats domestication Evolution fruit crops fruit growing Gene Frequency Genetic diversity genetic markers genetic resources genetic structure Genetic Variation Genetics, Population Genotype Geography heterozygosity loci Mexico microsatellite repeats Microsatellite Repeats - genetics microsatellites Polaskia chichipe Population Dynamics Reproduction - physiology Selection, Genetic wild relatives |
| title | Genetic variation and evolution of Polaskia chichipe (Cactaceae) under domestication in the Tehuacan Valley, central Mexico |
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