نتایج جستجو برای: aegilops triuncialis l 2n4x28
تعداد نتایج: 618862 فیلتر نتایج به سال:
The Hardness (Ha) locus controls grain hardness in hexaploid wheat (Triticum aestivum) and its relatives (Triticum and Aegilops species) and represents a classical example of a trait whose variation arose from gene loss after polyploidization. In this study, we investigated the molecular basis of the evolutionary events observed at this locus by comparing corresponding sequences of diploid, ter...
Polyploidy is known to induce numerous genetic and epigenetic changes but little is known about their physiological bases. In wheat, grain texture is mainly determined by the Hardness (Ha) locus consisting of genes Puroindoline a (Pina) and b (Pinb). These genes are conserved in diploid progenitors but were deleted from the A and B genomes of tetraploid Triticum turgidum (AB). We now report the...
Analyses of frequencies of chromosome configurations in wheat and wheat hybrids are extended to include data from hybrids of three chromosome-pairing mutants of wheat with Aegilops variabilis and from autotetraploid Triticum monococcum. These data confirm and extend the theory proposed by Driscoll, Bielig and Darvey (1979). Homoeologous and homologous chromosome pairing are fundamentally identi...
The description of soil microbial community structure by phospholipid fatty acid (PLFA) profiles is based on the relationship between the phylogeny of microorganisms and their PLFA profiles. Based on this relationship, two community based microbiological measurements, namely, potential C source utilization patterns in Biolog microtiter plates and PLFA profiles were used to examine metabolic fin...
Abstract Winter annual grass species such as jointed goatgrass ( Aegilops cylindrica Host), downy brome Bromus tectorum L.), and feral rye Secale cereale L.) negatively affect winter wheat Triticum aestivum yields. To generate a novel in‐crop selective herbicide trait for control, mutagenesis was used to multiple lines resistant the acetyl co‐A carboxylase (ACCase) inhibitor quizalofop p‐ethyl ...
Introgressive hybridization has played a crucial role in the evolution of many plant species, especially polyploids. The duplicated genetic material and wide geographical distribution facilitate hybridization and introgression among polyploid species having either homologous or homoeologous genomes. Such introgression may lead to the production of recombinant genomes that are more difficult to ...
Restriction map variation in two 5-6-kb chloroplast DNA regions of five diploid Aegilops species in the section Sitopsis and two wild tetraploid wheats, Triticum dicoccoides and Triticum araraticum, was investigated with a battery of four-cutter restriction enzymes. A single accession each of Triticum durum, Triticum timopheevi and Triticum aestivum was included as a reference. More than 250 re...
A mitochondrial (mt) transcriptional unit, nad3-orf156, was studied in the nucleus-cytoplasm hybrids of wheat with D/D2 plasmons from Aegilops species and their parental lines. A comparative RFLP analysis and sequencing of the random PCR clones revealed the presence of seven sequence types and their polymorphic sites were mapped. All the hybrids possessed the paternal copies besides the materna...
در این تحقیق تعداد 120 نمونه Aegilops crassa (با ژنوم MMDD) بومی ایران از نظر پروتئین‌های گلوتنین با وزن مولکولی بالا مورد بررسی قرار گرفتند. پس از ارزیابی نوارهای باندی از بین متنوع‌ترین نوارها، 17 الگوی باندی انتخاب و جهت تعیین نوع پروتئین آنها از روش اسپکترومتری جرمی استفاده گردید. از بین 17 باند تنها 6 باند با احتمال بالا شناسایی گردیدند. از باندهای شناسایی شده 2 باند با باندهای موجود در Ae...
We have used network analysis to study gene sequences of the Triticum and Aegilops 5S rDNA arrays, as well as the spacers of the 5S-DNA-A1 and 5S-DNA-2 loci. Network analysis describes relationships between 5S rDNA sequences in a more realistic fashion than conventional tree building because it makes fewer assumptions about the direction of evolution, the extent of sexual isolation, and the pat...
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