نتایج جستجو برای: aegilops speltoides
تعداد نتایج: 1010 فیلتر نتایج به سال:
The sequences of x-type high-molecular-weight glutenin promoter (x-HGP) from 21 diploid Triticeae species were cloned and sequenced. The lengths of x-HGP varied from 897 to 955 bp, and there are 329 variable sites including 105 singleton sites and 224 polymorphic sites. Genetic distances of pairwise X-HGP sequences ranged from 0.30 to 16.40% within 21 species and four outgroup species of Hordeu...
Chromosome engineering is a useful strategy for transfer of alien genes from wild relatives into modern crops. However, this strategy has not been extensively used for alien gene introgression in most crops due to low efficiency of conventional cytogenetic techniques. Here, we report an improved scheme of chromosome engineering for efficient elimination of a large amount of goatgrass (Aegilops ...
A total of 37 original cDNA libraries and 9 derivative libraries enriched for rare sequences were produced from Chinese Spring wheat (Triticum aestivum L.), five other hexaploid wheat genotypes (Cheyenne, Brevor, TAM W101, BH1146, Butte 86), tetraploid durum wheat (T. turgidum L.), diploid wheat (T. monococcum L.), and two other diploid members of the grass tribe Triticeae (Aegilops speltoides ...
Durum wheat (Triticum turgidum L., 2n = 4x = 28; AABB genomes) is a natural hybrid-an allotetraploid between 2 wild species, Triticum urartu Tumanian (AA genome) and Aegilops speltoides Tausch (BB genome). Even at the allotetraploid level, durum wheat can tolerate chromosomal imbalance, for example, addition of alien chromosome 1E of diploid wheatgrass, Lophopyrum elongatum. Therefore, one way ...
In attempts to identify the phylogenetic donors of cytoplasm to EmmerDinkel and Timopheevi groups of wheat (Triticum), and the Aegilops kotschyiAe. variabilis complex, the restriction fragment patterns of chloroplast DNAs of representative species were compared with those of their putative diploid ancestors. The following seven restriction enzymes were used; BamHI, EcoRI, HindIII, KpnI, PstI, S...
آگاهی از تنوع ژنتیکی موجود در ارقام اهلی و خویشاوندان وحشی یک گونه گیاهی، در به‌کارگیری آن‌ها در برنامه-های اصلاحی از اهمیت زیادی برخوردار است. با توجه به اینکه بخش قابل‌توجهی از اراضی زیر کشت گندم در ایران در مناطق خشک قرارگرفته و اینکه گونه های گیاهی با راهبردهای مختلفی ازجمله تغییر در آنزیمهای آنتی اکسیدانی، خود را با تنشهای محیطی وفق میدهند، لذا مطالعه هرچه بیشتر در رابطه با شناسایی گو...
The somatic chromosomes of common wheat, Triticum aestivum L. (2n = 6x = 42), and those of two of its diploid progenitors and T. speltoides, have been individually identified by a Giemsa staining technique. In wheat, telocentric chromosomes were used to aid the recognition of individual chromosomes, and an ideogram has been constructed depicting the C-band positions. There is no similarity in t...
Gene flow between domesticated species and their wild relatives is receiving growing attention. This study addressed introgression between wheat and natural populations of its wild relatives (Aegilops species). The sampling included 472 individuals, collected from 32 Mediterranean populations of three widespread Aegilops species (Aegilops geniculata, Ae. neglecta and Ae. triuncialis) and compar...
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