CYTOGENETICS OF HYBRID INTROGRESSION IN ICELANDIC BIRCH

被引：30

作者：

ANAMTHAWATJONSSON, K

TOMASSON, T

机构：

[1] Agricultural Research Institute of Iceland, Reykjavik, 112, Keldnaholt

来源：

HEREDITAS | 1990年 / 112卷 / 01期

关键词：

D O I：

10.1111/j.1601-5223.1990.tb00138.x

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

Cytogenetic analysis has made it possible to describe the mechanism of introgression between two Icelandic birch species, dwarf arctic birch (Betula nana L.) and pubescent birch (Betula pubescem Ehrh.). It is suggested that the gene flow is predominantly from B. nana (2n=28) to B. pubescens (2n=56) via hybridization and subsequent backcrossing of the hybrids with B. pubescens. accompanied by selection of the introgressant type. The mechanism of such transfer is from diploid to tetraploid levels via intermediate triploids, not through the formation of aneuploid complexes. Copyright © 1990, Wiley Blackwell. All rights reserved

引用

页码：65 / 70

页数：6

共 9 条

[1] THE FEULGEN-GIEMSA METHOD FOR CHROMOSOMES OF BETULA SPECIES [J].