Multiple haploids, triploids, and tetraploids found in modern-day “living fossil” Ginkgo biloba

查看全文 作　　者：[1]PetrŠmarda;Lucie [1]Horová;Ondřej [1]Knápek;Heidi [2]Dieck;Martin [2]Dieck;Katarína [3]Ražná;Pavel [4]Hrubík;Laszlo [5]Orlóci;Laszlo [5]Papp;Kristýna [1]Veselá;Pavel [1]Veselý;Petr [1]Bureš

机构地区：[1]Department of Botany and Zoology,Masaryk University,Koltlářská2,CZ-61137,Brno,Czech Republic;[2]Herrenkamper Gärten,Herrenkamp 1,DE-27254,Siedenburg,Germany;[3]Department of Genetics and Plant Breeding,Slovak University of Agriculture in Nitra,Tr.A.Hlinku 2,94976,Nitra,Slovakia;[4]Slovak University of Agriculture in Nitra,Faculty of Horticulture and Landscape Engineering,Dunajská16,94911,Nitra,Slovakia;[5]Botanical Garden of Eötvös University,Illés utca 25,Budapest,Hungary

出　　处：《Horticulture Research》索引2018年第5卷第1期,共12页

基　　金：This work was supported by the Czech Science Foundation(grant GAČR P50514-30313S). 摘　　要：Ginkgo biloba,the last extant representative of a lineage of Mesozoic gymnosperms,is one of the few seed plants with an exceptionally long(~300 Myr)evolutionary history free of genome-wide duplications(polyploidy).Despite this genome conservatism,we have recently found a viable spontaneous tetraploid Ginkgo sapling during routine screening of several plants,demonstrating that natural polyploidy is possible in Ginkgo.Here we provide a much wider flow cytometry survey of ploidy in some European Ginkgo collections,and own seedlings(>2200 individuals and~200 cultivars).We found a surprisingly high level of ploidy variation in modern-day Ginkgo and documented altogether 13 haploid,3 triploid,and 10 tetraploid Ginkgo plants or cultivars,most of them being morphologically distinct from common diploids.Haploids frequently produced polyploid(dihaploid)buds or branches.Tetraploids showed some genome size variation.The surveyed plants provide a unique resource for future Ginkgo research and breeding,and they might be used to accelerate the modern diversification of this nearly extinct plant lineage. 关键词：ROUTINE breeding SPITE

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Multiple haploids, triploids, and tetraploids found in modern-day “living fossil” Ginkgo biloba

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