نتایج جستجو برای: tauschii and strangulata
تعداد نتایج: 16827278 فیلتر نتایج به سال:
Transposable elements (TE) exist in the genomes of nearly all eukaryotes. TE mobilization through 'cut-and-paste' or 'copy-and-paste' mechanisms causes their insertions into other repetitive sequences, gene loci and other DNA. An insertion of a TE commonly creates a unique TE junction in the genome. TE junctions are also randomly distributed along chromosomes and therefore useful for genome-wid...
We investigated the composition and the basis of genome expansion in the core Triticeae genome using Aegilops tauschii, the D-genome donor of bread wheat. We sequenced an unfiltered genomic shotgun (trs) and a methylation-filtration (tmf) library of A. tauschii, and analyzed wheat expressed sequence tags (ESTs) to estimate the expression of genes and transposable elements (TEs). The sampled D-g...
Single- and low-copy genes are less likely to be subject to concerted evolution. Thus, they are appropriate tools to study the origin and evolution of polyploidy plant taxa. The plastid 3-phosphoglycerate kinase gene (Pgk-1) sequences from 44 accessions of Triticum and Aegilops, representing diploid, tetraploid, and hexaploid wheats, were used to estimate the origin of Triticum petropavlovskyi....
The genetic relationships of A genomes of Triticum urartu (Au) and Triticum monococcum (Am) in polyploid wheats are explored and quantified by AFLP fingerprinting. Forty-one accessions of A-genome diploid wheats, 3 of AG-genome wheats, 19 of AB-genome wheats, 15 of ABD-genome wheats, and 1 of the D-genome donor Ae. tauschii have been analysed. Based on 7 AFLP primer combinations, 423 bands were...
To examine the role of isoamylase1 (ISA1) in amylopectin biosynthesis in plants, a genomic DNA fragment from Aegilops tauschii was introduced into the ISA1-deficient rice (Oryza sativa) sugary-1 mutant line EM914, in which endosperm starch is completely replaced by phytoglycogen. A. tauschii is the D genome donor of wheat (Triticum aestivum), and the introduced fragment effectively included the...
چکیده گندم یک منبع عمده انرژی، پروتئین و فیبرهای غذائی در رژیم غذائی بوده و مهم ترین گیاه زراعی دنیاست. گونه های خویشاوند وحشی گندم های زراعی به عنوان منابع بالقوه دارای مواد ژنتیکی ارزشمند برای اصلاح گندم می باشند. بدلیل سطح قابل ملاحظه ای از گندم کشت شده در ایران، تعیین خویشاوندی ژنتیکی ارقام و ژنوتیپ های گندم برای حفظ تنوع ژنتیکی، شناسائی و انتخاب ژنوتیپ های مطلوب در جهت اصلاح گندم ارزشمند...
Barley (Hordeum vulgare L.) possesses a large and highly repetitive genome of 5.1 Gb that has hindered the development of a complete sequence. In 2012, the International Barley Sequencing Consortium released a resource integrating whole-genome shotgun sequences with a physical and genetic framework. However, because only 6278 bacterial artificial chromosome (BACs) in the physical map were seque...
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