Home About Browse Search
Svenska


Meiotic investigations on embryo sac mother cells of normal and desynaptic Norway spruce

Jonsson, Alena (1973). Meiotic investigations on embryo sac mother cells of normal and desynaptic Norway spruce. Technical Report. Stockholm: Predecessors to SLU > Royal School of Forestry, Sveriges lantbruksuniversitet. Studia forestalia Suecica ; 105
[Report]

[img]
Preview
PDF
2MB

Abstract

The purpose of the present investigation was to compare the megasporogenesis in a clone of Norway spruce with an ordinary seed set and a clone of a reduced seed set. The early prophase I stages had the same appearance in both clones. During the last part of diplotene there was a separation of the bivalents (i.e. desynapsis occurred) in the clone with the reduced seed set. During metaphase I-anaphase I 97 per cent of the embryo sac mother cells from the desynaptic clone contained at least one univalent. As a consequence of the occurrence of univalents micronuclei and other irregularities were observed during subsequent stages. Frequently the irregularities caused a degeneration of the cells. Thus, it was proved that the desynapsis was responsible for the poor seed set in the desynaptic clone of Norway spruce.

Authors/Creators:Jonsson, Alena
Title:Meiotic investigations on embryo sac mother cells of normal and desynaptic Norway spruce
Series/Journal:Studia forestalia Suecica (0039-3150)
Year of publishing :1973
Number:105
Number of Pages:46
Place of Publication:Stockholm
Publisher:Skogshögskolan
ISBN for printed version:91-38-01612-5
ISSN:0039-3150
Language:English
Publication Type:Report
Full Text Status:Public
Subjects:Obsolete subject words > FORESTRY, AGRICULTURAL SCIENCES and LANDSCAPE PLANNING > Plant production > Plant breeding
Keywords:Norway spruce, coniferae, meiosis, cells
URN:NBN:urn:nbn:se:slu:epsilon-9-92
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-9-92
ID Code:5710
Department:Predecessors to SLU > Royal School of Forestry
Deposited By: Skogsbiblioteket Umeå
Deposited On:21 Feb 2011 00:00
Metadata Last Modified:13 Nov 2015 13:02

Repository Staff Only: item control page

Downloads

Downloads per year (since September 2012)

View more statistics

Downloads
Hits