Karyotypes, chromosome bands and genome size variation in New Zealand endemic gymnosperms

被引：20

作者：

Davies, BJ

O'Brien, IEW

Murray, BG

机构：

[1] Univ Auckland, Sch Biol Sci, Auckland, New Zealand

[2] Hort & Food Res Inst New Zealand Ltd, Auckland, New Zealand

来源：

PLANT SYSTEMATICS AND EVOLUTION | 1997年 / 208卷 / 3-4期

关键词：

Gymnospermae; Podocarpaceae; karyotypes; fluorochrome banding; nuclear DNA variation;

D O I：

10.1007/BF00985440

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Karyotype studies on 20 taxa of gymnosperms endemic to New Zealand show a wide diversity of chromosome number and form. Fluorochrome banding with DAPI and CMA reveals a depauperate pattern of bands with CMA and no reliable banding with DAPI. Characteristically one pair of chromosomes shows a prominent CMA band, which may or may not be associated with a secondary constriction. A band size polymorphism was observed in all plants of Dacrycarpus dacrydioides, irrespective of the sex of the plant. Measurements of genome size by flow cytometry show a range of values from 12.3 pg to 40.0 pg DNA per 2C nucleus. Intraspecific variation in genome size was observed in Manoao colensoi.

引用

页码：169 / 185

页数：17

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