| A new puroindoline b mutation present in Chinese winter wheat cultivar Jingdong 11 Journal of Cereal Science 42:267-269 |
| Chen,F.,He,Z.,Xia,X.,Lillemo,M.,Morris,C. |
| Kernel hardness is one of the most important characteristics in determining utilization and marketing of bread wheat. Genes coding for
puroindoline a and b (PINA and PINB) were located at the Ha locus and designated as Pina-D1 and Pinb-D1, respectively. The coding
sequence of the Pinb gene in a Chinese winter wheat cultivar Jingdong 11 (Triticum aestivum L.) was amplified with polymerase chain
reaction (PCR), and the obtained 447-bp fragment sequenced from two strands, and compared with the eight known Pinb alleles. The results
showed that Jingdong 11 possessed a new Pinb allele not reported previously, and was designated as Pinb-D1q. It is characterized by a single
base T to G substitution, which results in a tryptophan to leucine substitution (TGG to TTG) at position 44 and is most likely the cause of hard
grain texture in Jingdong 11. The characterization of Pinb-D1 alleles would be helpful in manipulating grain hardness of bread wheat in
breeding programs.
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