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morphological variability and genetic diversity in five species of Skeletonema(Bacillariophyta)

Progress in Natural Science:Materials International 2008年第11期18卷 1345-1355页

作者： Ho Kin-Chung School of Science & Technology The Open University of Hong Kong

Twelve strains of Skeletonema from Chinese coastal waters and another strain from the West Sea of Korea were examined using light microscopy(LM),scanning and transmission electron microscopy(SEM,TEM),and small subunit(SSU)rDNA sequence *** identified four species of Skeletonema:*** Sarno et Zingone,***(***)Bethge,*** Sarno et Kooistra,***- icum Cleve,as well as a Skeletonema-like *** are the first records of ***,*** and *** in *** Skeletonema-like species,MMDL5067,was isolated from the estuary of the Changjiang *** morphologic and phylogenetic char- acteristics of this species are not correspond to those of any previously published Skeletonema *** intercalary fultoportula pro- cesses(IFPPs)has long open tubes,and the intercalary rimoportula process(IRP)is short and located inside the rim of the IFPPs. Phylogenetic analysis revealed that MMDL5630 clustered with *** in the NJ and MP trees,but its IRPs differed from those of previously described specimens of *** IRP is partially open,with an elongated opening at the base of the tube,and is longer than the *** specimens of *** and *** also have longer tubular IRPs than the *** to pre- viously described specimens of *** and ***,these two specimens we identified have shorter *** results reflect the ambiguity and diversity of Skeletonema *** are also significant for the future identification and management of red tides caused by Skeletonema in the seas around China.

关键词： morphological variability Genetic diversity Skeletonema SSU rDNA

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Morphometric study confirms the presence of only Vatica mangachapoi on Hainan Island, China

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Journal of Forestry Research 2018年第3期29卷 636-643页

作者： Junjie Guo Shuaibin Shang Jie Zeng Research Institute of Tropical Forestry CAF

To date only one species of the genus Vatica Linn.(Dipterocarpaceae) has been identified, and a subspecies and three varieties have been reported on Hainan Island, China. However, it remained controversial whether the species was Vatica mangachapoi or a new species Vatica hainanensis, and whether the subspecies or varieties are taxonomically valid. We evaluated here morphometric variations of 133 trees collected from nine populations and herbarium specimens of Vatica spp. using 16 traits of leaf and fruit. Among these, leaf traits varied more within and among populations than did fruit traits. Four traits of ratios were more stable than directly-measured traits within and among populations. The ranges of lamina length, lamina width and height of maximum lamina width point were the greatest among the 16 traits, while number of lateral veins varied least among the 12 directly-measured traits. Measurements from all 9 populations overlapped for each morphological trait, and variation of each trait was continuous among both individuals and populations. The range of variation did not distinguish any specimen from V mangachapoi as described in the flora of Southeast Asia By cluster analysis, individuals of each population as wel as specimens of each variety formed no distinct clusters The published varieties thus were characterized by no distinguishing variations in comparison with the nine sampled populations. In conclusion, the new species V hainanensis as well as the subspecies and varieties were not supported by our comparisons, and only V. man gachapoi without any subspecies or varieties occurs on Hainan Island, China.

关键词： Vatica Linn. Vatica mangachapoi morphological variability Cluster analysis Hainan Island

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morphological Study of Ficus deltoidea Jack in Malaysia

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Journal of Agricultural Science and Technology(B) 2013年第2期3卷 144-150页

作者： Nor Asiah Awang Sayed M.Zain Hasan Mohammad Shafie B.Shafie Department of Agrotechnology Faculty of Agrotechnology and Food Science Universiti Malaysia Terengganu (UMT) 21030 KualaTerengganu Terengganu Malaysia

Ficus deltoidea Jack （Moraceae） or Mas Cotek is a small shrub with a great morphological variation. Measurement of 40 morphological traits had been done on 50 accessions to find the most significant characters that enable differentiation being done according to its variety groups. The data were analyzed with principal component analysis （PCA） and cluster analysis （CA） using cluster software package programme to produce the scatter diagram and dendrogram relationship of the taxa. The results showed that there were 25 morphological characters having the value of factor analysis greater than 0.60 from its principal component （PC） with the Eigen value greater than 1.0. 16 out of 40 morphological characters had been identified as having high values of correlation coefficient ranging from -0.783 to 0.890. The analysis showed that the most responsible characters in grouping the samples into different groups are the shape and size of leaf, number and color of dots on the leaf surface and characters of syconium. The scatter diagram of the accessions on the PC1 against PC2 showed six major groups. The dendrogram displayed the relationship among the accessions and within the dissimilarity distance = 19, it classified the samples into five major groups. Observation on F. deltoidea resulted in the findings of high variability among the accessions. The most significant characters in grouping accessions are the shapes of leaf base （BL）, shape of leaf apex （SA）, ratio of lamina width to lamina length （R）, dots color at the lower midrib （DLM）, color of young syconium （CYS）, color of mature syconium （CMS） and the number of syconium on trees （DST）. This study provides basic information for introduction of some particular traits and effective conservation of the species breeding programme. The morphological traits were found to be useful for the diversity studies and in identifying the variation. The actual figures of F. deltoidea obtained through this study enable comparison being don

关键词： Ficus deltoidea cluster analysis diversity morphological variability principal component analysis

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morphological Characterization of the Blood Plum (Haematostaphis barteri Hook. F. (Anacardiaceae)) in the Republic of Benin

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Journal of Agricultural Science and Technology(B) 2020年第2期10卷 106-117页

作者： Bienvenue Nawan Kuiga Sourou Towanou Houetchegnon Christine Ouinsavi Laboratory of Forestry Studies and Research Faculty of AgronomyUniversity of ParakouParakouParakou BP:123Benin

Understanding species morphological variation across geographical ranges can serve as a first step for germplasm collection and the conservation of genetic *** morphological variability of Haematostaphis barteri Hook.F.(Anacardiaceae)in Benin(West Africa)was studied,using 11 traits related to panicles,fruits,leaves and leaflets.A total of 1,485 panicles,1,485 fruits,990 leaves and 4,950 leaflets were *** was found that the sample provenance and site topography have a significant influence on the morphological *** discriminating morphological traits were the length of the panicles,the number of fruits per panicle,the length and width of fruits,the mass of the fresh fruit pulp mass,the length of leaves and petioles,the number of leaflets per leaf,length and width of *** the basis of these traits,four different morphotypes of *** were identified,with however a small intra and inter group *** morphotype from sites established on the tops and the high slopes of hill produced larger and heavier fruits with higher pulp *** morphotype could be of interest for future varietal selection programs for the species in Benin.

关键词： Benin Haematostaphis barteri morphological variability provenance topography

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