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Fast integration and accumulation of beneficial breeding alleles through an AB–NAMIC strategy in wheat

Plant Communications 2023年第3期4卷 66-79页

作者： Chengzhi Jiao Chenyang Hao Tian Li Abhishek Bohra Lanfen Wang Jian Hou Hongxia Liu Hong Liu Jing Zhao Yamei Wang Yunchuan Liu Zhiwei Wang Xin Jing Xiue Wang Rajeev K.Varshney Junjie Fu Xueyong Zhang The National Key Facility for Crop Gene Resources and Genetic Improvement/Institute of Crop Sciences Chinese Academy of Agricultural SciencesBeijing 100081China State Key Laboratory of Crop Genetics and Germplasm Enhancement Cytogenetics InstituteNanjing Agricultural UniversityNanjingJiangsu 210095China Centre for Crop&Food Innovation WA State Agricultural Biotechnology CentreFood Futures InstituteMurdoch UniversityPerthWA 6150Australia Smartgenomics Technology Institute Tianjin 301700China

Wheat(Triticum aestivum)is among the most important staple crops for safeguarding the food security of the growing world *** bridge the gap between genebank diversity and breeding programs,we developed an advanced backcross-nested association mapping plus inter-crossed population(AB-NAMIC)by crossing three popular wheat cultivars as recurrent founders to 20 germplasm lines from a mini core *** backcrossing combined with selection against undesirable traits and extensive crossing within and between sub-populations created new opportunities to detect unknown genes and increase the frequency of beneficial alleles in the AB-NAMIC *** performed phenotyping of 590 AB-NAMIC lines and a natural panel of 476 cultivars for six consecutive growing seasons and genotyped these 1066 lines with a 660K SNP ***-wide association studies of both panels for plant development and yield traits demonstrated improved power to detect rare alleles and loci with medium genetic effects in ***,genome-wide association studies in AB-NAMIC detected the candidate gene TaSWEET6-7B(TraesCS7B03G1216700),which has high homology to the rice SWEET6b gene and exerts strong effects on adaptation and yield *** commercial release of two derived AB-NAMIC lines attests to its direct applicability in wheat *** information on genome-wide association studymapping,candidate genes,and their haplotypes for breeding traits are available through *** research provides an excellent framework for fast-tracking exploration and accumulation of beneficial alleles stored in genebanks.

关键词： wheat genebank AB-NAMIC genome-wide association studies GWAS beneficial alleles genomics-assisted breeding wheatgab

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