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Variations in seed size and seed mass related to tree growth over 5 years for 23 provenances of Quercus acutissima from across China

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Journal of Forestry Research 2017年第5期28卷 917-924页

作者： Hui Zhang Xiuqing Yang Mukui Yu Youzhi Han Tonggui Wu Research Institute of Subtropical Forestry Chinese Academy of Forestry Forestry College Shanxi Agriculture University

The origin of a seed strongly impacts its traits, and both origin and seed traits influence seed germination and seedling development. However, in many instances, this effect on the seedling does not persist into adulthood, and little is known about how seed traits and original environment affect seedling/tree growth over time. In this study, seed size, seed mass, seedling/tree growth and origins were collected and determined for 23 provenances of Quercus acutissima from across China. Origin variables correlated well with seed size and seed mass. In stepwise multiple regressions, a longitudinal aridity index explained 49.2-68.7% of the total variation in seed size and mass, while only seed width was correlated with seedling/tree height (H) and diameter at the ground (D) from seed traits and origins. The total variance in H and D explained by the models decreased over time, for example, the R 2 value of the models for H declined from 0.477 in the first year to 0.224 in the fourth year; no models was significant in the fifth year. These results indicate that seed size, regulated by the longitudinal aridity index strongly impacted seedling and tree growth, but the strength of the influence decreased over time, and disappeared after 4 years.

关键词： Seed size Seed mass provenance trial Seedling/tree growth Origins Quercus acutissima

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Genetic variations of wood properties and growth characters of Ko-rean pines from different provenances

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Journal of Forestry Research 2002年第4期13卷 277-280,337页

作者：王慧梅夏德安王文杰杨书文东北林业大学

Totally 26 provenance stands of 17-year-old Korean pine were selected for investigating wood properties and growth characters in Mao抏rshan Experimental Forest Farm of Northeast Forestry University in 1999. The anatomical property indexes, including tracheid length, tracheid diameter and wall-indiameter ratio, and the physical property indexes, such as growth ring width, late wood percentage and growth ring density, were measured for wood properties. Growth character indexes, including tree height and diameter at breast height, were also measured. The analytical results showed that there exited obviously dif-ference in wood property indexes between different provenances, which is suggested that wood properties are controlled by their genetic differences. The growth character indexes of Korean pines presented significant difference and they might also be controlled by their genetic differences. Most parameters of wood properties mainly varied in the direction of longitude, but the parameters of growth characters varied in the direction of latitude.

关键词： Korean pine provenance trial Wood properties Geographical variation Genetic variation

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维普期刊数据库

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Variation, heredity and selection of effective ingredients in Magnolis officinalis of different provenances

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Journal of Forestry Research 2002年第1期13卷 7-11,82页

作者：童再康曾燕如斯金平浙江林学院临安311300 景宁县科学技术委员会景宁323500

Bark samples of Magnolis officinalis were collected from a 7-year-old trial plantation with 13 provenances in Jingning County of Zhejiang Province on June 25, 2000. The contents of magnolol and honokiol of M. officinalis were analyzed by the method of HPLC (High Performance Liquid Chromatogram). The results showed that such qualitative traits as the content of magnolol, content of honokiol, total content of key phenols, and the ratio of magnolo to honokiol differ significantly between the provenances. The provenances with a sharpened leaf tip from the western part of Hubei Province has a highest content of phenols, and that with a concave leaf tip from the Lushan Mountain has a lowest content of phenols. All these four qualitative traits were genetically controlled, with a heritability between 0.8342 and 0.9871 in terms of provenance. In addition, both longitudinal and latitudinal geographical variations could be found, with longitudinal variations being dominant. As a result, 3 superior provenances from Wufeng, Enshi and Hefeng of the western part of Hubei as well as 10 high-quality individuals were selected.

关键词： Magnolia officinalis provenance trial Magnolol Honokiol Geographical variation provenance selection

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