裸子植物的染色体数目——最新进展

IF 1.1 4区农林科学 Q3 FORESTRY

Silvae Genetica Pub Date : 2020-01-01 DOI:10.2478/sg-2020-0003

S. Rastogi, D. Ohri

{"title":"裸子植物的染色体数目——最新进展","authors":"S. Rastogi, D. Ohri","doi":"10.2478/sg-2020-0003","DOIUrl":null,"url":null,"abstract":"Abstract The present report is based on a cytological data base on 614 (56.0 %) of the total 1104 recognized species and 82 (90.0 %) of the 88 recognized genera of gymnosperms. Family Cycadaceae and many genera of Zamiaceae show intrageneric uniformity of somatic numbers, the genus Zamia is represented by a range of number from 2n=16-28. Ginkgo, Welwitschia and Gentum show 2n=24, 2n=42, and 2n=44 respectively. Ephedra shows a range of polyploidy from 2x-8x based on n=7. The family Pinaceae as a whole shows 2n=24except for Pseudolarix and Pseudotsuga with 2n=44 and 2n=26 respectively. Araucariaceae constantly shows 2n=26 while Podocarpaceae has a range of 2n=18-38. Sciadopityaceae and Cupressaceae are represented by 2n=20 and 2n=22 respectively. Taxaceae shows variable numbers of 2n=24, 36 and 22. Polyploidy is exceptional being represented by 8.0 % of the taxa studied. B-chromosomes have been studied in 31 taxa while heteromorphic sex chromosomes have been reported in some dioecious taxa.","PeriodicalId":21834,"journal":{"name":"Silvae Genetica","volume":"18 1","pages":"13 - 19"},"PeriodicalIF":1.1000,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"9","resultStr":"{\"title\":\"Chromosome Numbers in Gymnosperms - An Update\",\"authors\":\"S. Rastogi, D. Ohri\",\"doi\":\"10.2478/sg-2020-0003\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Abstract The present report is based on a cytological data base on 614 (56.0 %) of the total 1104 recognized species and 82 (90.0 %) of the 88 recognized genera of gymnosperms. Family Cycadaceae and many genera of Zamiaceae show intrageneric uniformity of somatic numbers, the genus Zamia is represented by a range of number from 2n=16-28. Ginkgo, Welwitschia and Gentum show 2n=24, 2n=42, and 2n=44 respectively. Ephedra shows a range of polyploidy from 2x-8x based on n=7. The family Pinaceae as a whole shows 2n=24except for Pseudolarix and Pseudotsuga with 2n=44 and 2n=26 respectively. Araucariaceae constantly shows 2n=26 while Podocarpaceae has a range of 2n=18-38. Sciadopityaceae and Cupressaceae are represented by 2n=20 and 2n=22 respectively. Taxaceae shows variable numbers of 2n=24, 36 and 22. Polyploidy is exceptional being represented by 8.0 % of the taxa studied. B-chromosomes have been studied in 31 taxa while heteromorphic sex chromosomes have been reported in some dioecious taxa.\",\"PeriodicalId\":21834,\"journal\":{\"name\":\"Silvae Genetica\",\"volume\":\"18 1\",\"pages\":\"13 - 19\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2020-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"9\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Silvae Genetica\",\"FirstCategoryId\":\"97\",\"ListUrlMain\":\"https://doi.org/10.2478/sg-2020-0003\",\"RegionNum\":4,\"RegionCategory\":\"农林科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"FORESTRY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Silvae Genetica","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.2478/sg-2020-0003","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"FORESTRY","Score":null,"Total":0}

引用次数: 9

摘要

摘要本报告基于裸子植物1104种中614种(56.0%)和88个属中82种(90%)的细胞学数据。苏铁科和扎米科许多属的体细胞数在属内表现出均匀性，扎米属的体细胞数范围为2n=16-28。银杏2n=24，何首乌2n=42，大黄2n=44。麻黄显示多倍体的范围从2 -8倍基于n=7。Pinaceae科整体为2n=24，除pseudoarix和pseudosuga分别为2n=44和2n=26外。Araucariaceae的2n=26, Podocarpaceae的2n=18-38。Sciadopityaceae和柏科分别用2n=20和2n=22表示。红豆杉科的变异数为2n=24、36和22。多倍体是罕见的，在所研究的分类群中有8.0%的多倍体。在31个分类群中发现了b染色体，在一些雌雄异株分类群中发现了异型性染色体。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Chromosome Numbers in Gymnosperms - An Update

Abstract The present report is based on a cytological data base on 614 (56.0 %) of the total 1104 recognized species and 82 (90.0 %) of the 88 recognized genera of gymnosperms. Family Cycadaceae and many genera of Zamiaceae show intrageneric uniformity of somatic numbers, the genus Zamia is represented by a range of number from 2n=16-28. Ginkgo, Welwitschia and Gentum show 2n=24, 2n=42, and 2n=44 respectively. Ephedra shows a range of polyploidy from 2x-8x based on n=7. The family Pinaceae as a whole shows 2n=24except for Pseudolarix and Pseudotsuga with 2n=44 and 2n=26 respectively. Araucariaceae constantly shows 2n=26 while Podocarpaceae has a range of 2n=18-38. Sciadopityaceae and Cupressaceae are represented by 2n=20 and 2n=22 respectively. Taxaceae shows variable numbers of 2n=24, 36 and 22. Polyploidy is exceptional being represented by 8.0 % of the taxa studied. B-chromosomes have been studied in 31 taxa while heteromorphic sex chromosomes have been reported in some dioecious taxa.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Silvae Genetica 农林科学-林学

CiteScore

2.20

自引率

10.00%

发文量

审稿时长

3 months

期刊介绍： Silvae Genetica is an international peer reviewed journal with more than 65 year tradition and experience in all fields of theoretical and applied Forest Genetics and Tree breeding. It continues "Zeitschrift für Forstgenetik und Forstpflanzenzüchtung" (Journal of Forest Genetics and Forest Tree Breeding) founded by W. LANGNER in 1951.