نتایج جستجو برای: genetic diversity within species

تعداد نتایج: 2068858  

B. Shiran N. Kharazian N. Salehi

This study concerns the genetic diversity and taxonomic status of Marrubium species from central and south-west of Zagros region, Iran. It is investigated by Inter-Simple Sequence Repeat analysis. A total of 68 accessions from five Marrubium species were collected from their natural habitats. Molecular analysis was approved with 17 primers, of which 12 were carried out in the reaction mixture. ...

Journal: :پژوهشنامه اصلاح گیاهان زراعی 0
بنفشه محجوب حمید نجفی زرینی سیدحمیدرضا هاشمی

study of genetic relationships is a prerequisite for plant breeding activities as well as for conservation of genetic resources. since the hybrid canola have more yield than inbred lines, determine the genetic diversity of this have particular importance. in the present study, genetic diversity among 36 genotype of brassica sp. were determined using inter simple sequence repeat (issr) markers. ...

Journal: رستنیها 2017
Hamid Reza Zamanizadeh, Kasra Sharifi, Mansoureh Mirabolfathy Rasoul Zare Saeed Rezaee,

Thirty-seven isolates of Fusarium graminearum species complexobtained from wheat heads with Fusarium head blight symptoms were selected and used for phylogenetic studies. They were collected from different localities of Moghan plain (Ardebil province, Iran). Partial sequences of translation elongation factor 1-alpha (TEF), putative reductase (RED) and UTP-ammonia ligase (URA) genes were amplifi...

Based on the purpose of conservation planning for native species, sixteen populations of cattle, goat andsheep were analyzed by amplification of genomic DNA using inter-simple sequence repeat (ISSR) markers toestimate of genetic structure. DNA samples of 275 animals were collected to Paccess their genetic content.The polymorphism information content (PIC) values and genetic di...

ژورنال: بوم شناسی آبزیان 2014
Elahe , Amoeei khozani, Kolangi Miandare, Hamed , Shabani, Ali ,

Paraschistur anielseni is one of the main species of Paraschistura genus that is distributed in freshwater rivers which drain into the Persian Gulf. There has not been any study on genetic diversity of this species yet. In this investigation, 90 samples were collected from the rivers Shapour, Dalaki (Fars province) and Mand (Bushehr province) (30 samples per river) to investigate their populati...

2016
Wumei Xu Lu Liu Tianhua He Min Cao Liqing Sha Yuehua Hu Qiaoming Li Jie Li

A negative species-genetic diversity correlation (SGDC) could be predicted by the niche variation hypothesis, whereby an increase in species diversity within community reduces the genetic diversity of the co-occurring species because of the reduction in average niche breadth; alternatively, competition could reduce effective population size and therefore genetic diversity of the species within ...

Journal: :مرتع و آبخیزداری 0
قدرت اله حیدری استادیار دانشکدة منابع طبیعی دانشگاه علوم کشاورزی و منابع طبیعی ساری حمید رضا سعیدی گراغانی دانشجوی دکتری مرتع داری دانشگاه تهران

assessment of diversity and species richness in the understanding of ecosystem functions, protect and preserve genetic resources, evaluation and control of environmental change and the success or failure will help natural resource management programs. arbitrary banning livestock grazing program and one of the most common and perhaps the most degraded pastures and reduced the diversity and speci...

خوشخوی, مرتضی , سیدطباطبایی, بدرالدین ابراهیم , قبادی, سیروس ,

Grapevine (Vitis vinifera L.) is a clonally propagated major fruit crop. In grapevine, identification of genotypes with amplographical features is often based on mature plant characteristics that may be affected by environmental conditions. This approach lacks objectivity and reliability. Recently, molecular markers have proved to be supplementary techniques to analyze genetic diversity and exa...

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