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| Wei,Shuhong; Peng,Zhengsong; Zhou,Yonghong; Yang,Zaijun; Wu,Kai; Ouyang,Zhongming. |
| In this work, we examined the genetic diversity and evolution of the WAG-2 gene based on new WAG-2 alleles isolated from wheat and its relatives. Only single nucleotide polymorphisms (SNP) and no insertions and deletions (indels) were found in exon sequences of WAG-2 from different species. More SNPs and indels occurred in introns than in exons. For exons, exons+introns and introns, the nucleotide polymorphism Π decreased from diploid and tetraploid genotypes to hexaploid genotypes. This finding indicated that the diversity of WAG-2 in diploids was greater than in hexaploids because of the strong selection pressure on the latter. All dn/ds ratios were < 1.0, indicating that WAG-2 belongs to a conserved gene affected by negative selection. Thirty-nine of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Copy number variation; Genetic diversity; Molecular evolution; Triticum; WAG-2. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572011000400013 |
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| Yang,Zaijun; Peng,Zhengsong; Wei,Shuhong; Yu,Yan. |
| In this work, we report the cloning and characterization of endo-β-1,4-glucanase (EGase) genes (TaEG) in the common wheat line three pistils. Three TaEG homoeologous genes (TaEG-4A, TaEG-4B and TaEG-4D) were isolated and found to be located on chromosomes 4AL, 4BS and 4DS, respectively. The three genes showed high conservation of their coding nucleotide sequences and 3 untranslated region. The putative TaEG protein had a molecular mass of 69 kDa, a theoretical pI of 9.39 and a transmembrane domain of 74-96 amino acids in the N-terminus that anchored the protein to the membrane. The genome sequences of TaEG-4A, TaEG-4B and TaEG-4D contained six exons and five introns. All of the introns, except for intron IV, varied in length and sequence composition.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cloning endo-β-1; 4-glucanase three pistils line wheat. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572013000300015 |
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