Association of Puroindoline b-B2 variants with grain traits,yield components and flag leaf size in bread wheat (Triticum aestivum L.) varieties of the Yellow and Huai Valleys of China |
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Authors: | Feng Chen Fuyan Zhang Xiyong Cheng Craig Morris Haixia Xu Zhongdong Dong Kehui Zhan Dangqun Cui |
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Institution: | 1. Department of Agronomy, Henan Agricultural University, 95 Wenhua Road, Zhengzhou 450002, China;2. USDA-ARS, Western Wheat Quality Laboratory, E-202 Food Science and Human Nutrition Facility East, Washington State University, Pullman, WA 99164, USA |
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Abstract: | A total of 169 wheat (Triticum aestivum L.) varieties (landraces and cultivars) were used to asses the relationship between Puroindoline D1 alleles and Puroindoline b-B2 variants and grain hardness, other grain traits, yield components, and flag leaf size. Results indicated that the average SKCS hardness of Pinb-B2v3 varieties was significantly greater than that of Pinb-B2v2 varieties within the soft Puroindoline D1 haplotype sub-group. Conversely, no statistically significant difference was obtained for SKCS hardness between varieties with the Pinb-B2v3 vs. Pinb-B2v2 alleles within the two hard Puroindoline D1 haplotypes (Pinb-D1b and Pinb-D1p sub-groups). Therefore, the Puroindoline b-B2 gene may have a bigger impact on soft wheat varieties than hard. Across all varieties, thousand-kernel weight, grain weight per spike, grain diameter, grain number per spike, flag leaf width and area of Pinb-B2v3 varieties were significantly greater than those possessing Pinb-B2v2. These results indicated that the Pinb-B2v3 allele was associated with preferable grain yield traits compared to the Pinb-B2v2 allele in bread wheat. This study provides evocative information for better understanding the molecular and genetic basis of wheat grain yield. |
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Keywords: | Bread wheat Puroindoline gene Puroindoline b-B2 gene Grain yield traits |
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