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首页> 外文期刊>Genetic Resources and Crop Evolution >Genome sizes and ploidy levels in Mexican cactus pear species Opuntia (Tourn.) Mill. series Streptacanthae Britton et Rose, Leucotrichae DC., Heliabravoanae Scheinvar and Robustae Britton et Rose
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Genome sizes and ploidy levels in Mexican cactus pear species Opuntia (Tourn.) Mill. series Streptacanthae Britton et Rose, Leucotrichae DC., Heliabravoanae Scheinvar and Robustae Britton et Rose

机译：墨西哥（Tourn。）工厂的花椒仙人掌物种基因组大小和倍性水平。 Streptacanthae系列Britton et Rose，600 leucotrichus。，Heliabravoanae Scheinvar和stout Britton et Rose

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摘要

The ploidy levels and amounts of DNA of 23 Opuntia species from Mexico were determined by flow cytometry. Four different ploidy levels (2n = 2x, 2n = 4x, 2n = 6x, 2n = 8x) with 2C-DNA amount ranging from 4.17 pg (Opuntia incarnadilla Griffiths) to 6.53 pg (Opuntia heliabravoana Scheinvar) were determined among the samples analyzed. Polyploidy is widespread (93%) among these Opuntia species. Opuntia heliabravoana Scheinvar was the sole diploid species. Opuntia leucotricha DC. (2C = 5.71 pg), Opuntia spinulifera Salm-Dyck (2C = 5.51 pg), Opuntia robusta Wendl. ex Pfeiff. var. larreyi (F. A. C. Weber) Bravo (2C = 4.98 pg), and Opuntia elizondoana E. Sánchez et Villase?or (2C = 5.29 pg) were tetraploids. Opuntia oligacantha C.F. F?rst. (2C = 5.33 pg), Opuntia incarnadilla Griffiths and Opuntia matudae Scheinvar (2C = 5.25 pg) were hexaploids. Opuntia zamundioi Scheinvar (2C = 4.35 pg), Opuntia lasiacantha Pfeiff. (2C = 4.88 pg), Opuntia hyptiacantha F.A.C. Weber (2C = 4.84 pg), Opuntia streptacantha Lem. ssp. streptacantha (2C = 4.64 pg) and Opuntia streptacantha Lem. subsp. aguirrana Scheinvar et A.?Rodríguez (2C = 4.43 pg), Opuntia megacantha Salm-Dyck (2C = 5.01 pg), Opuntia joconostle F.A.C. Weber. ex Diguet (2C = 4.70 pg), Opuntia ficus-indica (L.) Miller (2C = 4.90 pg), Opuntia albicarpa Scheinvar (2C = 4.80 pg), Opuntia?amarilla Griffiths (2C = 4.84 pg), Opuntia chavena Griffiths (2C = 4.70 pg), Opuntia cochinera Griffiths (2C = 5.10 pg), Opuntia fuliginosa Griffiths (2C = 4.64 pg), Opuntia pachona Griffiths (2C = 4.70 pg), Opuntia cretochaeta Griffiths (2C = 4.35 pg), Opuntia rzedowskii Scheinvar (2C = 4.77 pg), Opuntia robusta Wendl. ex Pfeiff. ssp. robusta (2C = 4.98 pg) and Opuntia robusta Wendl. ex Pfeiff. var. guerrana (Griffiths) Sánchez-Mejorada (2C = 5.05 pg) were all octoploids. The series Streptacanthae Britton et Rose showed a high level of ploidy with octoploid species except for Opuntia heliabravoanae Scheinvar (2n = 2x), Opuntia elizondoana E. Sánchez and Villase?or (2n = 4x) and O. matudae Scheinvar (2n = 6x). Opuntia spinulifera Salm-Dyck was determined to be as a tetraploid species. Series Leucotrichae DC. grouped tetraploid and hexaploid species. The monospecific series Heliabravoanae Scheinvar has one species: Opuntia heliabravoana Scheinvar diploid (2n = 2x). The monospecific series Robustae Britton et Rose seems to be a contradictory group; containing three varieties: Opuntia robusta Wendl. ex Pfeiff. ssp. robusta and Opuntia robusta Wendl. ex Pfeiff. var. guerrana (Griffiths) Sánchez-Mejorada as octoploid taxa and: Opuntia robusta Wendl. ex Pfeiff. var. larreyi (F.A.C. Weber) Bravo which is tetraploid. In earlier report Rafael del Castillo and Mario González-Espinosa (1988) indicate that the arborescent varieties of this species are diploid and the postrate variety tetraploid. Implications for botanical systematics, genetic resources and breeding are discussed.
机译：流式细胞仪测定了墨西哥23种仙人掌的倍性水平和DNA含量。在所分析的样品中，确定了四个不同的倍性水平（2n = 2x，2n = 4x，2n = 6x，2n = 8x），其2C-DNA量范围为4.17 pg（Opuntia incarnadilla Griffiths）至6.53 pg（Opuntia heliabravoana Scheinvar）。在这些仙人掌物种中，多倍体现象很普遍（93％）。仙人掌Heliabravoana Scheinvar是唯一的二倍体物种。仙人掌白粉DC。 （2C = 5.71 pg），刺仙人掌Salm-Dyck（2C = 5.51 pg），罗布斯塔仙人掌。前Pfeiff。变种larreyi（F. A. C. Weber）Bravo（2C = 4.98 pg）和Opuntia elizondoana E.Sánchezet Villase？or（2C = 5.29 pg）是四倍体。仙人掌寡头C.F.第一。 （2C = 5.33 pg），仙人掌仙人掌，格里菲斯和仙人掌苦瓜（2C = 5.25 pg）是六倍体。 Zauntdioi Scheinvar仙人掌（2C = 4.35 pg），lasiacantha Pfeiff仙人掌。 （2C = 4.88 pg），仙人掌hyptiacantha F.A.C.韦伯（2C = 4.84 pg），仙人掌链霉菌素。 ssp。 Streptacantha（2C = 4.64 pg）和Opuntia streptacantha Lem。亚种aguirrana Scheinvar等人Rodríguez（2C = 4.43 pg），巨型仙人掌（Omuntia megacantha Salm-Dyck（2C = 5.01 pg），仙人掌joconostle F.A.C.韦伯。 ex Diguet（2C = 4.70 pg），仙人掌榕（L.）Miller（2C = 4.90 pg），Albicarpa Scheinvar仙人掌（2C = 4.80 pg），Amuntia？amarilla Griffiths（2C = 4.84 pg），Chaunta Griffiths（2C = 4.84 pg） 2C = 4.70 pg），Countera cochinera格里菲斯（2C = 5.10 pg），fulfulininosa Griffiths（2C = 4.64 pg），punta pachona Griffiths（2C = 4.70 pg），仙人掌cretochaeta Griffiths（2C = 4.35 pg），仙人掌S（ 2C = 4.77 pg），蓬松仙人掌。前Pfeiff。 ssp。罗布斯塔（2C = 4.98 pg）和罗布斯塔仙人掌。前Pfeiff。变种瓜拉那（Griffiths）Sánchez-Mejorada（2C = 5.05 pg）都是八倍体。 Streptacanthae Britton et Rose系列显示了八倍体物种和八倍体物种的高倍性，除了仙人掌仙人掌（2n = 2x），仙人掌仙人掌E.Sánchez和比利亚塞？or（2n = 4x）和麦角菜O. matudae Scheinvar（2n = 6x）。 。刺槐Salm-Dyck被确定为四倍体物种。系列Leucotrichae DC。分为四倍体和六倍体物种。单特异性系列Heliabravoanae Scheinvar有一个物种：仙人掌Heliabravoana Scheinvar二倍体（2n = 2x）。单特异性系列Robustae Britton et Rose似乎是一个矛盾的群体。包含三种变种：蓬松仙人掌。前Pfeiff。 ssp。罗布斯塔和仙人掌罗布斯塔·温德尔。前Pfeiff。变种瓜拉那（Griffiths）Sánchez-Mejorada为八倍体类群和：Opuntiarobusta Wendl。前Pfeiff。变种larreyi（F.A.C. Weber）Bravo，是四倍体。拉斐尔·德尔卡斯蒂略（Rafael del Castillo）和马里奥·冈萨雷斯（MarioGonzález-Espinosa）（1988）指出，该树的树状品种是二倍体，而后速率是四倍体。讨论了对植物学系统学，遗传资源和育种的影响。

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