文献类型：期刊文献

英文题名：Phenotypic Variation and Diversity in Fruit, Leaf, Fatty Acid, and Their Relationships to Geoclimatic Factors in Seven Natural Populations of Malania oleifera Chun et SK Lee

作者：Li, Hongguo[1] Wang, Ruizhen[2] Tian, Zuwei[1] Xu, Jihuang[1] Sun, Wensheng[1] Duan, Runmei[1] Fu, Hao[1] Li, Yunmu[3] Zhang, Yalin[4] Dong, Leiming[2]

第一作者：李洪果

通信作者：Dong, LM[1]

机构：[1]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Peoples R China;[2]Beijing Bot Garden, Beijing Floriculture Engn Technol Res Ctr, Beijing 100093, Peoples R China;[3]Guangxi Inst Chinese Med & Pharmaceut Sci, Nanning 530022, Peoples R China;[4]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry &, Beijing 100091, Peoples R China

年份：2022

卷号：13

期号：10

外文期刊名：FORESTS

收录：;EI(收录号：20224413036230);Scopus(收录号：2-s2.0-85140750017);WOS:【SCI-EXPANDED(收录号:WOS:000873184900001)】；

基金：This work was supported by grants from the Natural Science Foundation of Guangxi Province (2020GXNSFAA297261) and the Natural Science Foundation of Beijing (6224061).

语种：英文

外文关键词：Malania oleifera; nervonic acid; variation; diversity; natural populations; germplasm resources

摘要：Malania oleifera Chun et S.K. Lee is an endangered woody oil tree that produces nervonic acid, which is closely related to brain development. The phenotypic variation and diversity in some representative traits in natural populations are poorly understood. To investigate phenotypic variation, diversity and their relationship with geoclimatic factors, we evaluated 21 traits of 97 sampled individuals from seven natural populations. Coefficient of variation for 21 traits widely ranged from 0.05 (shape index of fruit) to 0.62 (water content of dry kernel), with an average of 0.18. The Shannon-Wiener indices ranged from 1.91 (water content of dry kernel) to 2.06 (leaf length and leaf width), with an average of 1.94. The variation of 20 traits was significantly influenced by the population effect (p < 0.05). The 21 traits were reduced to six principal components, which collectively accounted for 86.64% of the total phenotypic variation. The seven population was mainly divided into two groups: Group I, which included four populations distributed throughout the southern region and having wider and shorter leaves, larger fruit transverse diameters, and higher content of fatty acid and nervonic acid in the kernel, and Group II included the left populations with relative opposite characteristics to those in Group I. Trees with shorter leaves tend to produce oblate shape and heavier dried kernel, yielding more fatty acid and nervonic acids, and population-level pairwise kernel morphological distance were positively correlated with fatty acid distance (Mantel r = 0.39, p < 0.05). Annual average humidity was strongly positively correlated with leaf index (length/width, r = 0.78) but had a negative correlation with the kernel dry weight (r = -0.84). The shape of the kernel gradually altered from oblate to globose as longitude and rainfall increased. The environment became colder as latitude increased, resulting in a steady decrease in fatty acid content. No significant isolation by climatic and geographical distance was found for morphological and fatty acid variability. These results can have an important implication for genetic improvement, diversity conservation and resource management of the species in the future.