Freeze testing and field mortality ofPinus sylvestris(L.) in northern Sweden
作者:
Jan‐Erik Nilsson,
Gösta Eriksson,
期刊:
Scandinavian Journal of Forest Research
(Taylor Available online 1986)
卷期:
Volume 1,
issue 1-4
页码: 205-218
ISSN:0282-7581
年代: 1986
DOI:10.1080/02827588609382412
出版商: Taylor & Francis Group
关键词: Pinus sylvestris;early testing;freeze testing;field mortality;population;family
数据来源: Taylor
摘要:
Six short‐term freezing experiments were carried out on 24 one‐year‐old single‐tree open pollinated families ofPinus sylvestris(L.) representing four populations in northerly Sweden (latitude 62°10'N to 66°50'N). Two experiments were conducted in a climate chamber, two in a greenhouse and two outdoors. For freeze testing the plants were exposed to ‐10°C for three hours in a freezing chamber. A freezing experiment in a climate chamber of 28 one‐year‐old full‐sib families (half diallel with two parents from each population) was also carried out. The results were related to the mortality of the same open pollinated families over the first 18 years in the field. The ranking of the populations was the same in all six freezing experiments as in the field. Significant differences in frost resistance between one‐year‐old open pollinated families were found within all populations except the most northern one. The correlations within populations between frost resistance and field mortality varied considerably between populations and freezing experiments. The results from the two greenhouse experiments showed the best correlations with the cumulative field mortality after 18 years. The freezing test of the 28 full‐sib families resulted in the same mutual ranking, according to the general combining ability of parents within populations, as was obtained from the freezing tests of single tree families.
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