نتایج جستجو برای: genetic diversity within species

تعداد نتایج: 2068858  

Journal: :journal of plant molecular breeding 2013
nesa jafari reza behroozi abdolreza bagheri nasrin moshtaghi

expressed sequence tags simple sequence repeats (est-ssrs) are important sources for investigation ofgenetic diversity and molecular marker development. similar to genomic ssrs, the est-ssrs are usefulmarkers for many applications in genetics and plant breeding such as genetic diversity analysis, molecularmapping and cross-transferability across related species and genera. in spite of low polym...

2005

versity through genetic drift, founder effects, and genetic bottlenecks. Such events can reduce a population’s evolutionary potential and increase the risk of extinction. In this chapter, we use plant immigrants as a model system to examine the circumstances in which genetic bottlenecks do (and do not) occur and where in the hierarchical partitioning of genetic diversity such bottlenecks take p...

Fifteen yarrow populations from different species Achillea millefolium L., A. biebersteinii L. and A. nobilis, from different geographical areas of Iran were studied using 24 morphological traits and peroxidase profiles. Comparison of mean values of different phenotypic traits show A. millefolium and A. biebersteinii L. had higher plant height and crown diameter; however, A. nobilis had higher ...

2017
Péter Poczai Ildikó Varga Neil E. Bell Jaakko Hyvönen

Genetic diversity is the fundamental source of biodiversity – the total number of genetic characters contributing to variation within species. In other words it is the measure that quantifies the variation found within a population of a given species. Genetic diversity among individuals reflects the presence of different alleles in the gene pool, and hence different genotypes within populations...

ژورنال: آبزیان زینتی 2019
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Genetic diversity is one of the important and essential characteristics of any population for its survival. The study of genetic variation in different populations of aquatic organisms is of particular importance in order to protect, stabilize and manage their stocks. Based on studies conducted in recent years, molecular markers have proven that they can be used as indicators of the genetic div...

2016
J. L. Bossart Josephine B. Antwi

Article history: Received 17 July 2015 Received in revised form 17 March 2016 Accepted 24 March 2016 Available online xxxx Sacred forest groves are often located in some of the world's hottest hotspots of biodiversity, and consequently have high potential conservation value. Recent efforts to quantify their value have focused nearly exclusively on a single component of diversity, species divers...

Journal: :American journal of botany 2012
Shannon D Fehlberg Carolyn J Ferguson

PREMISE OF THE STUDY Polyploidy is widely recognized as an important process in the evolution of plants, but less attention has been paid to the study of intraspecific polyploidy, including its prevalence, formation, taxonomic implications, and effect on genetic diversity, structure, and gene flow within and among individuals and populations. Here we studied intraspecific ploidy level variation...

Journal: :شیلات 0
بهروز میرزایی1 1. دانش آموخته کارشناسی ارشد، گروه شیلات دانشکده منابع طبیعی دانشگاه زابل ابراهیم علیزاده دوغیکلایی2 2. دانشیار گروه شیلات دانشکده منابع طبیعی دانشگاه زابل برزان بهرامی کمانگر3 3. استادیار گروه شیلات دانشکده منابع طبیعی دانشگاه کردستان علی ارشدی4 4. استادیار گروه شیلات دانشکده منابع طبیعی دانشگاه زابل

inter simple sequence repeat (issr) analysis was performed to evaluate genetic diversity and genetic structure of six capoeta trutta populations from two main watersheds in the kurdistan province. fish samples were caught from the choman, shooei, garmab rivers in the choman watershed and from the gheshlagh, gavarood, sirvan rivers in the sirvan watershed. from six used dinucleotide primers, thr...

نیکوی, مهرداد, همرنگ, نازنین, پوربابائی, حسن,

  Information about gaps and their sizes distribution is useful for protecting herbaceous diversity. This study was conducted to investigate the effect of gap size on herbaceous species diversity in oriental beech (Fagus orientalis Lipsky.) stand in Asalem, Guilan province. For this study, fifteen gaps in small, medium, and large sizes were randomly selected. Then, herbaceous species were ident...

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