scholarly journals A Global Analysis of Y-STR INRA189 Polymorphism in Chinese Domestic Yak Breeds/Populations

Animals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 393
Author(s):  
Zhijie Ma ◽  
Xiaoting Xia ◽  
Shengmei Chen ◽  
Ma Bai ◽  
Chuzhao Lei ◽  
...  
Keyword(s):  
Distribution Pattern ◽  
Geographical Distribution ◽  
Sequence Alignment ◽  
Polymorphism Information Content ◽  
Gene Pool ◽  
Global Analysis ◽  
Genetic Difference ◽  
Genetic Origin ◽  
Genetic Events ◽  
Geographical Distribution Pattern

The objective of this study was to probe into the polymorphism of Y-STR INRA189 and identify the geographical distribution pattern of its alleles in the Chinese domestic yak gene pool. We examined the variation at INRA189 locus in 682 male yaks representing 15 breeds/populations in China. The results showed that six alleles, including five reported previously (149, 155, 157, 159, and 161 bp) and a new one identified in this study (139 bp), were detected at INRA189 locus based on genotyping analysis. The frequencies of six alleles varied among the 15 yak breeds/populations with a clear phylogeographical pattern, which revealed the paternal genetic difference among Chinese yak breeds/populations. The average polymorphism information content (PIC) among the 15 yak breeds/populations was 0.32, indicating INRA189 to be an intermediate polymorphic Y-STR marker (0.25 < PIC < 0.5) in yak. Sequence alignment revealed that the variations among six alleles at INRA189 were defined by a TG dinucleotide repeat motif, which repeated for 12, 17, 20, 21, 22, and 23 times, corresponding to the alleles of 139, 149, 155, 157, 159, and 161 bp, respectively. Therefore, we believe that the polymorphic yak Y-STR INRA189 can be used to characterize male-mediated genetic events, including paternal genetic origin, diversity, and evolution.

Geographical distribution pattern of species diversity of the genus Populus L. in China

2018 ◽  
Vol 38 (1) ◽  
Author(s):  
王芳 WANG Fang ◽  
熊喆 XIONG Zhe ◽  
延晓冬 YAN Xiaodong ◽  
戴新刚 DAI Xingang ◽  
王磊斌 WANG Leibin ◽  
...  
Keyword(s):  
Species Diversity ◽  
Distribution Pattern ◽  
Geographical Distribution ◽  
Geographical Distribution Pattern

scholarly journals Potential geographical distribution and environmental explanations of rare and endangered plant species through combined modelling: A case study of Northwest Yunnan, China

2020 ◽  
Author(s):  
Pengcheng Ye ◽  
Guangfu Zhang ◽  
Xiao Zhao ◽  
Hui Chen ◽  
Qin Si ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Distribution Pattern ◽  
Geographical Distribution ◽  
Plant Species ◽  
Ecological Niche ◽  
Potential Distribution ◽  
Distribution Patterns ◽  
Endangered Plant ◽  
Rare And Endangered ◽  
Geographical Distribution Pattern

In recent decades, due to the effect of climate change and the interference of human activities, the species habitat index fallen 2%. Studying the geographical distribution pattern and predicting the potential geographical distribution of species are of great significance for developing scientific and effective biodiversity conservation strategies. The purpose of this research is to predict the potential geographical distribution of 25 rare and endangered plant species in Northwest Yunnan, China on the grid map with a resolution of 0.05° × 0.05° and analyze the explanation capabilities of various environmental factors on the potential geographical distribution patterns of these species, and explore the main restrictive environmental factors. Initially, we employed the ecological niche model MaxEnt to predict the potential geographical distribution of target species. Following that, we overlaid the potential geographical distribution of each species, and we obtained the potential geographical distribution pattern of species richness on the spatial scale of the ecological niche model with a resolution of 0.05° × 0.05°. Ultimately, we also adopted geographically weighted regression (GWR) model to investigate the explanation capabilities of various environmental parameters on the potential distribution patterns. The results showed that the average AUC value of each species was between 0.80 and 1.00, which indicated that the simulation precision of the MaxEnt model for each species was good or excellent. Besides, the potential distribution areas of these species were between 826.33 km2 and 44,963.53 km2. In addition, the average contribution values of the annual precipitation (Bio12), precipitation of coldest quarter (Bio19) and population density (Pop) were 25.92%, 15.86% and 17.95%, respectively. Moreover, the goodness of fit R2 and AIC value of the water model were 0.88 and 7,703.82, respectively, which indicated the water factor largely influenced the potential distribution of these species. The results of this study would be helpful for implementing long-term conservation and reintroduction for these species.

Revision of the genus Macrostomus Wiedemann (Diptera, Empididae, Empidinae). III. The limbipennis species-group

Zootaxa ◽  
2012 ◽  
Vol 3361 (1) ◽  
pp. 45-55
Author(s):  
JOSÉ ALBERTINO RAFAEL ◽  
JEFFREY M. CUMMING
Keyword(s):  
New Species ◽  
Distribution Pattern ◽  
Geographical Distribution ◽  
Federal District ◽  
Species Group ◽  
Mato Grosso ◽  
Male And Female ◽  
Two New Species ◽  
Geographical Distribution Pattern

All species of Macrostomus Wiedemann allied with Macrostomus limbipennis (Bezzi), are treated in the limbipennis species-group, which is defined on the basis of characters of the male and female terminalia, and a relatively wide female frons. Threecurrently recognized species and two new species are included, namely M. inflatus, sp. nov. from Brazil (Federal District), M.limbipennis (Bezzi, 1909), M. nigriventris (Macquart, 1846), M. nitidus, sp. nov. from Brazil (Goiás and Mato Grosso states)and M. penai Rafael & Cumming, 2006. All primary types were examined and a lectotype is designated for M. limbipennis(Bezzi, 1909). A key to the species is presented along with the geographical distribution pattern exhibited by the limbipennis species-group.

Emended description and geographical distribution of Sporisorium elegantis (Ustilaginaceae), a species shared between West Africa and India

Phytotaxa ◽  
2014 ◽  
Vol 175 (3) ◽  
pp. 148 ◽  
Author(s):  
Marcin Piątek ◽  
Jolanta Piątek ◽  
Nourou S. Yorou
Keyword(s):  
West Africa ◽  
Distribution Pattern ◽  
Geographical Distribution ◽  
Rare Species ◽  
Smut Fungus ◽  
Smut Fungi ◽  
Western Africa ◽  
Emended Description ◽  
First Time

Sporisorium elegantis, a smut fungus on Thelepogon elegans, is reported for the first time from Benin (West Africa). Based on this collection, an emended description and illustration of this rare species are provided. The geographical distribution of Sporisorium elegantis is documented for Benin, Nigeria and India. The disjunctive occurrence of this species between (western) Africa and India is interesting, though not exceptional in smut fungi. The mechanisms responsible for such a distribution pattern are not known.

scholarly journals Geographic Distribution of Environmental Relative Moldiness Index Molds in USA Homes

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
Stephen Vesper ◽  
Jennie Wakefield ◽  
Peter Ashley ◽  
David Cox ◽  
Gary Dewalt ◽  
...  
Keyword(s):  
United States ◽  
Distribution Pattern ◽  
United States Of America ◽  
Principal Component ◽  
The United States ◽  
Spatial Distributions ◽  
Healthy Homes ◽  
Variable Clustering ◽  
Settled Dust ◽  
Geographical Distribution Pattern

Objective. The objective of this study was to quantify and describe the distribution of the 36 molds that make up the Environmental Relative Moldiness Index (ERMI).Materials and Methods. As part of the 2006 American Healthy Homes Survey, settled dust samples were analyzed by mold-specific quantitative PCR (MSQPCR) for the 36 ERMI molds. Each species' geographical distribution pattern was examined individually, followed by partitioning analysis in order to identify spatially meaningful patterns. For mapping, the 36 mold populations were divided into disjoint clusters on the basis of their standardized concentrations, and First Principal Component (FPC) scores were computed.Results and Conclusions. The partitioning analyses failed to uncover a valid partitioning that yielded compact, well-separated partitions with systematic spatial distributions, either on global or local criteria. Disjoint variable clustering resulted in seven mold clusters. The 36 molds and ERMI values themselves were found to be heterogeneously distributed across the United States of America (USA).

scholarly journals Characterization of the geographical distribution pattern of the family Limacinidae Gray, 1840 (Mollusca - Gastropoda) in the waters of Northeastern of Brazil

2014 ◽  
Vol 14 (2) ◽  
Author(s):  
Valdeni Soares de Oliveira Koblitz ◽  
Maria Eduarda de L. Larrazábal
Keyword(s):  
Geographical Distribution ◽  
Mesh Size ◽  
First Record ◽  
Program Assessment ◽  
Ecological Aspects ◽  
The Family ◽  
First Time ◽  
Plastic Containers ◽  
Geographical Distribution Pattern

The geographical distribution of the family Limacinidae in the Northeastern coast of Brazil was analyzed by taking into account the most relevant ecological aspects, aiming to increase the knowledge about the Family. The material was collected during the 4th Oceanographic Expedition of the REVIZEE program (Assessment of the Sustainable Potential of Living Resources in the Exclusive Economic Zone - Avaliação do Potencial Sustentável de Recursos Vivos da Zona Econômica Exclusiva), in the months from September to December 2000. The studied area is located between 00°46’45”N and 13°53’45”S and between 29°15’40”W and 39°49’42”W, where six trips were performed, totaling 123 stations. The samples were collected using a bongo net (300- and 500-µm mesh size and net mouths of 60 cm in diameter) coupled with a digital flowmeter in oblique hauls from a depth of 0 to 200 m. For this study, the organisms retained in the 300-µm mesh were considered. On board the ship, the samples were placed in plastic containers, labeled, and fixed in 4% formaldehyde buffered with sodium tetraborate. In the laboratory, the samples were analyzed on a “Bogorov” tray under a binocular stereomicroscope. A total of 5655 individuals of the family Limacinidae were examined and were distributed as follows: 3 genera and 5 species. Representatives of the family Limacinidae were observed at high temperatures and salinities and were thus characterized as tropical and euhaline.Heliconoides inflatus was the species with the greatest abundance and frequency. Limacina lesueurii proved to be a rare, infrequently observed species. Limacina trochiformis andL. bulimoides were not abundant or frequent.Limacina lesueurii and L. bulimoides were recorded in neritic waters for the first time; this was also the first record ofL. lesueurii in the waters of Northeastern Brazil.Limacina trochiformis and L. bulimoidesexhibited wide distributions, although they were neither very frequently observed nor abundant. The distribution of Thielea helicoideswas restricted to oceanic waters. A correlation between Limacina bulimoides, Heliconoides inflatus, Thielea helicoides, and L. lesueurii was observed because they coexisted in the same niche.

The status of the staphylinid genera Derops Sharp and Rimulincola Sanderson (Coleoptera)

1983 ◽  
Vol 14 (3) ◽  
pp. 269-279 ◽  
Author(s):  
A. Smetana
Keyword(s):  
North America ◽  
Distribution Pattern ◽  
Geographical Distribution ◽  
Systematic Position ◽  
Published Data ◽  
Southern Illinois ◽  
The Family ◽  
The Status ◽  
New Tribe ◽  
Nearctic Region

AbstractThe systematic position of the genus Derops Sharp, 1889 (several species in the Palaearctic and Oriental regions) within the family Staphylinidae and its relationship to the genus Rimulincola Sanderson, 1947 (one species in the eastern Nearctic region) are discussed. The genus Derops is shown to be congeneric with Rimulincola, which becomes a junior synonym of Derops. — The genus Derops is removed from the subfamily Phloecharinae and reassigned to the subfamily Tachyporinae as a separate new tribe Deropsini. A key to the tribes of Tachyporinae is given. — Derops kasugaensis (Sawada, 1956) is placed in synonymy with Derops longicornis Sharp, 1889. The published data on the ecology of species of Derops are summarized and detailed ecological observations by the author on D. divalis (southern Illinois) andD. longicornis (Japan, Honshu) are given and compared. The disjunct (eastern and/or midwestern North America-southeastern Asia) type of geographical distribution of Derops is discussed and compared with similar distributions of the syrphid genus Pterallastes Loew (Diptera and some plant genera). This distribution pattern is considered to be unique within the order Coleoptera.

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