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פותח על ידי קלירמאש פתרונות בע"מ -
Performance of seedlings from selected sources of eucalyptus occidentalis in a semi-arid mediterranean-type environment
Year:
1991
Source of publication :
South African Forestry Journal
Authors :
זהר, יחיאל
;
.
Volume :
159
Co-Authors:
Zohar, Y., Department of Natural Resources (Forestry Section), Agricultural Research Organisation The Volcani Center, P.O. Box 6, Bet-Dagan, Israel
Facilitators :
From page:
37
To page:
41
(
Total pages:
5
)
Abstract:
The development of seedlings grown from seeds taken from 10 elite trees of various provenances of Eucalyptus occidentalis was compared with that of randomly selected seedlings from a commercial nursery. The study was conducted on a loess soil in the northern Negev of Israel, where mean annual precipitation varies between 250 and 350 mm. The height and diameter of the seedlings were measured 22 and 30 months after planting. Significant differences in volume at 30 months were found between the control and four selected sources but variability within source was very large. Analysis of the three biggest trees of each source (including the control) in each replication indicated that the best trees of six sources were far superior to the best trees of the control. The mean volume of the best sources at age 30 months ranged between 0, 0049 and 0, 006 2 m3/tree. At the same time the mean volume of the control trees was less than 0, 002 m3/tree. A similar pattern was found for the volume increment between 22 and 30 months of the five biggest trees of each source. Large differences were found between the mean volume of all trees per selected seed source and the mean of their three best trees. Such differences among control trees were much smaller. These data suggest that the genetic variability of progenies, even from selected superior trees of E. occidentalis is very large, and collection of seed from selected trees can produce only moderate improvements in growth. On the other hand, the potential for improvement through vegetative propagation seems much greater. © 1991 Taylor & Francis Group, LLC.
Note:
Related Files :
עוד תגיות
תוכן קשור
More details
DOI :
10.1080/00382167.1991.9630393
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
21981
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:48
Scientific Publication
Performance of seedlings from selected sources of eucalyptus occidentalis in a semi-arid mediterranean-type environment
159
Zohar, Y., Department of Natural Resources (Forestry Section), Agricultural Research Organisation The Volcani Center, P.O. Box 6, Bet-Dagan, Israel
Performance of seedlings from selected sources of eucalyptus occidentalis in a semi-arid mediterranean-type environment
The development of seedlings grown from seeds taken from 10 elite trees of various provenances of Eucalyptus occidentalis was compared with that of randomly selected seedlings from a commercial nursery. The study was conducted on a loess soil in the northern Negev of Israel, where mean annual precipitation varies between 250 and 350 mm. The height and diameter of the seedlings were measured 22 and 30 months after planting. Significant differences in volume at 30 months were found between the control and four selected sources but variability within source was very large. Analysis of the three biggest trees of each source (including the control) in each replication indicated that the best trees of six sources were far superior to the best trees of the control. The mean volume of the best sources at age 30 months ranged between 0, 0049 and 0, 006 2 m3/tree. At the same time the mean volume of the control trees was less than 0, 002 m3/tree. A similar pattern was found for the volume increment between 22 and 30 months of the five biggest trees of each source. Large differences were found between the mean volume of all trees per selected seed source and the mean of their three best trees. Such differences among control trees were much smaller. These data suggest that the genetic variability of progenies, even from selected superior trees of E. occidentalis is very large, and collection of seed from selected trees can produce only moderate improvements in growth. On the other hand, the potential for improvement through vegetative propagation seems much greater. © 1991 Taylor & Francis Group, LLC.
Scientific Publication
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