نتایج جستجو برای: in ae tauschii
تعداد نتایج: 16977902 فیلتر نتایج به سال:
As the post-transcriptional regulators of gene expression, microRNAs or miRNAs comprise an integral part of understanding how genomes function. Although miRNAs have been a major focus of recent efforts, miRNA research is still in its infancy in most plant species. Aegilops tauschii, the D genome progenitor of bread wheat, is a wild diploid grass exhibiting remarkable population diversity. Due t...
High molecular weight glutenin subunits (HMW-GSs) play a major role in determining the dough quality of wheat. As D genome donor hexaploid wheat, Aegilops tauschii is an important genetic resource for wheat breeding. In present study, novel HMW-GSs from Ae. was identified and designated as Glu-Dt1. Multiple sequence alignment indicated that one cysteine mutated into arginine y-type subunit. Sit...
The allohexaploid bread wheat originally derived from three closely related species with A, B and D genome. Although numerous studies were performed to elucidate its origin and phylogeny, no consensus conclusion has reached. In this study, we cloned and sequenced the genes Wcor15-2A, Wcor15-2B and Wcor15-2D in 23 diploid, 10 tetraploid and 106 hexaploid wheat varieties and analyzed their molecu...
In higher plants, seed storage proteins (SSPs) are frequently expressed from complex gene families, and allelic variation of SSP genes often affects the quality traits of crops. In common wheat, the Glu-D1 locus, encoding 1Dx and 1Dy SSPs, has multiple alleles. The Glu-D1d allele frequently confers superior end-use qualities to commercial wheat varieties. Here, we studied the haplotype structur...
Bread wheat (Triticum aestivum, AABBDD) is an allohexaploid species derived from two rounds of interspecific hybridizations. A high-quality genome sequence assembly of diploid Aegilops tauschii, the donor of the wheat D genome, will provide a useful platform to study polyploid wheat evolution. A combined approach of BAC pooling and next-generation sequencing technology was employed to sequence ...
The wheat leaf-rust resistance gene Lr21 was first identified in an Iranian accession of goatgrass, Aegilops tauschii Coss., the D-genome donor of hexaploid bread wheat, and was introgressed into modern wheat cultivars by breeding. To elucidate the origin of the gene, we analyzed sequences of Lr21 and lr21 alleles from 24 wheat cultivars and 25 accessions of Ae. tauschii collected along the Cas...
Meiotic pairing between homoeologous chromosomes in polyploid wheat is inhibited by the Ph1 locus on the long arm of chromosome 5 in the B genome. Aegilops speltoides (genomes SS), the closest relative of the progenitor of the wheat B genome, is polymorphic for genetic suppression of Ph1. Using this polymorphism, two major suppressor loci, Su1-Ph1 and Su2-Ph1, have been mapped in Ae. speltoides...
The wheat leaf rust resistance gene Lr1 encodes a typical coiled-coil nucleotide-binding site leucine-rich repeat (CC-NBS-LRR) of protein containing 1 344 amino acids. WR003, cleaved amplified polymorphic sequence (CAPS) marker is derived from the LRR regions Lr1. In this study, worldwide collection 120 Aegilops tauschii accessions and 282 hexaploid varieties was screened for alleles using spec...
in order to determine the cytotypes of 67 accessions of aegilops crassa from iran, two flow cytometry and cytogenetics methods were applied. the nucleus of the young leaves was colored using dapi and the intensity of fluorescent determined by flow cytometry. by comparing the intensity of the fluorescent of the ae. crassa samples with ae. tauschii (as an standard sample), two cytotypes 4x and 6x...
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