Genetic diversity pattern of Stipa purpurea populations in the hinterland of Qinghai-Tibet Plateau

2008 ◽  
Vol 154 (1) ◽  
pp. 57-65 ◽  
Author(s):  
W.-S. Liu ◽  
M. Dong ◽  
Z.-P Song ◽  
W Wei
Keyword(s):  
Genetic Diversity ◽  
Tibet Plateau ◽  
Diversity Pattern ◽  
Stipa Purpurea ◽  
Qinghai Tibet Plateau

Assessment of genetic diversity and differentiation of Elymus nutans indigenous to Qinghai–Tibet Plateau using simple sequence repeats markers

2013 ◽  
Vol 93 (6) ◽  
pp. 1089-1096 ◽  
Author(s):  
Shiyong Chen ◽  
Xinquan Zhang ◽  
Xiao Ma ◽  
Linkai Huang
Keyword(s):  
Genetic Diversity ◽  
Simple Sequence Repeats ◽  
Tibet Plateau ◽  
Group Method ◽  
Similarity Coefficients ◽  
Arithmetic Average ◽  
Pair Group ◽  
Elymus Nutans ◽  
Qinghai Tibet Plateau ◽  
Simple Sequence

Chen, S., Zhang, X., Ma, X. and Huang, L. 2013. Assessment of genetic diversity and differentiation of Elymus nutans indigenous to Qinghai–Tibet Plateau using simple sequence repeats markers. Can. J. Plant Sci. 93: 1089–1096. Elymus nutans Griseb., an important alpine forage grass, is widely distributed in the Qinghai–Tibet Plateau. A total of 50 E. nutans accessions from the eastern Qinghai–Tibet Plateau were analyzed using simple sequence repeats (SSR) markers from wheat and Elymus species. Our results show that a total of 144 reliable bands were generated, of which 132 (91.38%) were found to be polymorphic. Nei-Li's genetic similarity coefficients ranged from 0.515 to 0.870 with an average of 0.719, which shows a high level of genetic diversity and a broad genetic base among accessions. There was a low correlation between genetic distance and geographical distance (r=0.121, P=0.088) in the region, which is consistent with the unweighted pair group method with arithmetic average cluster analysis of accessions. The mountain ridges and river valleys in the eastern Qinghai–Tibet region could serve as genetic barriers for pollinator movement and seed dispersal. The rule of the most genetic diversity at medium altitude of E. nutans in the Qinghai–Tibet Plateau was also validated in the study. The implications of these results for the conservation of E. nutans are discussed.

Variations in seed characteristics among and within Stipa purpurea populations on the Qinghai–Tibet Plateau

Botany ◽  
2015 ◽  
Vol 93 (10) ◽  
pp. 651-662 ◽  
Author(s):  
Xiong Li ◽  
Xin Yin ◽  
Shihai Yang ◽  
Yunqiang Yang ◽  
Min Qian ◽  
...  
Keyword(s):  
Seed Size ◽  
Environmental Conditions ◽  
Landscape Heterogeneity ◽  
Interspecific Variation ◽  
Vital Role ◽  
Tibet Plateau ◽  
Alpine Steppe ◽  
Stipa Purpurea ◽  
Qinghai Tibet Plateau ◽  
Seed Characteristics

Variation in seed size is common among plant species, populations, and individuals. On the Qinghai–Tibet Plateau, previous studies have mainly focused on interspecific variation in seed size, with little information available regarding intraspecific variation. The alpine steppe is among the most important vegetation types on the plateau, where it plays a vital role in preserving landscape heterogeneity and diversity. Stipa purpurea Griseb., endemic to the Qinghai–Tibet Plateau, is the predominant species of the alpine steppe. In the present study, we measured seed characteristics of nine S. purpurea populations and analyzed possible sources and consequences of variation in these characteristics. Seed characteristics varied greatly among and within populations. Our findings suggest that variation in seed size and awn length may affect germination and dispersal, respectively. Surprisingly, environmental factors, rather than genome size, were significantly correlated with seed size. For example, relative humidity and number of windy days were strongly correlated with seed size and awn length, respectively. We believe that variation in seed characteristics is a consequence of complex environmental conditions correlated with longitude and latitude. The results indicated that variation in seed characteristics of S. purpurea is an adaptation to environmental conditions.

scholarly journals Genetic Diversity Analysis and Potential Distribution Prediction of Sophora moorcroftiana Endemic to Qinghai–Tibet Plateau, China

Forests ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1106
Author(s):  
Lan Yang ◽  
Huie Li ◽  
Qian Li ◽  
Qiqiang Guo ◽  
Jiangrong Li
Keyword(s):  
Climate Change ◽  
Genetic Diversity ◽  
Potential Distribution ◽  
Germplasm Conservation ◽  
Woody Species ◽  
Cold Weather ◽  
Tibet Plateau ◽  
Conservation Strategies ◽  
Qinghai Tibet Plateau ◽  
Sophora Moorcroftiana

Sophora moorcroftiana (Benth.) Baker is an endemic woody species distributed in the Qinghai–Tibet Plateau (QTP), a part of the world characterized by high altitude and cold weather. In this study, the genetic diversity of S. moorcroftiana was evaluated based on 300 representative samples of 15 populations using 20 polymorphic SSR markers, and its potential distribution was predicted according to 19 bioclimatic factors using MaxEnt modeling. Results showed the population genetic diversity of S. moorcroftiana was generally not high (around 0.5), and the range of variation was small (0.437–0.539). Altitude, rather than other environmental factors, was the key factor affecting the present genetic diversity. Moreover, due to climate change in the QTP, the suitable area is increasing and will continue to increase by 48.35%, 84.44%, 101.98%, and 107.30% in the four future periods of 2030s, 2050s, 2070s, and 2090s, respectively, compared to the present, which is beneficial for S. moorcroftiana. These results will provide a theoretical basis for the development of germplasm conservation strategies for S. moorcroftiana and enrich information on the impacts of climate change on plants in the QTP.

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