%0 Journal Article
%T Morphological variation in cones and seeds in Abies chensiensis<br>秦岭冷杉球果与种子的形态变异
%A SUN Yu-Ling
%A <br>孙玉玲
%J 生态学报
%D 2005
%I 
%X The purposes of our study were: (1) to determine the relationships and variability between Abies chensiensis cones and seeds in different elevations and between the core and border regions, (2) to investigate variation between natural and managed forests, and (3) to determine the sources of variation to provide management suggestions.In this study, two sampling zones were selected from the core and border regions of Qin-Ling, China, where Abies chensiensis is naturally distributed. The core region is located in Qin-Ling Mountain and the border region in Shennongjia of Hubei Province. Morphological variations of cones and seeds collected from different altitudes and latitudes and between natural and managed forests were analyzed. We sampled twenty cones from 48 trees, 28 from Qinling Mountain and 20 from Shennongjia. Fifteen traits were measured for each cone and seed, including cone length, cone diameter, cone scale length, and bract length. Data were analyzed using SAS and SPSS. Our statistical analyses were composed of (1) correlation analyses for each trait among different elevations in Qinling Mountain, (2) calculation of means,standard deviation and coefficient of variation for each trait from natural and managed forests, (3) hierarchical analyses of variation with the same elevation in different regions, (4) variance analyses between two populations with different elevations in Shennongjia, and (5) variance analyses between natural and managed forests in Shennongjia. Results from correlation analyses suggested that morphological variation of cones and seeds was significantly correlated to elevation on Qinling Mountain, which indicated that elevation played an important role in morphological variation. Statistical differences were significant between regions with the same elevation and among trees within regions, as well as between natural and managed forests. The variance component analysis indicated that about 85 percent of the variation was attributable to differences between individual trees and within a tree, and the remaining 15 percent varied between regions,providing strong evidence of substantial genetic control over traits. The mean values of traits of cones and seeds from the core region were higher than that of in the border area, which indicated that Abies chensensis reproduced better in the core region. The analysis suggested that the mean and variation of traits of cones and seeds from managed forests were greater than that from the natural forests. It appears that traits of cones and seeds of Abies chensiensis could be improved by forestry practices in managed forests.
%K Abies chensiensis
%K cone
%K seed
%K morphological variation
%K elevation
%K Qinling
%K Shennongjia<br>秦岭冷杉
%K 球果
%K 种子
%K 形态变异
%K 海拔
%K 秦岭
%K 神农架
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=FE163E5DB2274E5937319DE98913EC37&aid=61734DA29E87B441&yid=2DD7160C83D0ACED&vid=C5154311167311FE&iid=CA4FD0336C81A37A&sid=5BC9492E1D772407&eid=7EBE588F611589FC&journal_id=1000-0933&journal_name=生态学报&referenced_num=22&reference_num=21