数字农科院2.0

Genetic Mapping Of Northern Corn Leaf Blight-Resistant Quantitative Trait Loci In Maize

文献类型: 外文期刊

作者: Xia, HF; Gao, W; Qu, J; Dai, LQ; Gao, Y; Lu, S; Zhang, M; Wang, PW; Wang, TY

作者机构:

关键词: Nclb-Resistant Genes; Northern Corn Leaf Blight; Quantitative Trait Loci; Single Nucleotide Polymorphisms

期刊名称: MEDICINE

ISSN: 0025-7974

年卷期: 2020 年 99 卷 31 期

页码:

收录情况: JCR(2021版)

摘要: Northern corn leaf blight (NCLB), a corn disease infected byExserohilum turcicum, can cause loss of harvest and economy. Identification or evaluation of NCLB-resistant quantitative trait loci (QTL) and genes could improve maize breeds. This study aimed to identify novel QTLs for NCLB-resistance. Two maize strains (BB and BC) were utilized to generate B73 x B97 and B73 x CML322 and constructed the genetic linkage using high-throughput single nucleotide polymorphism (SNP) linkage map analysis of 170 (BB) and 163(BC) recombinant inbred line (RIL) genomic DNA samples. NCLB-resistant QTL was associated with phenotypic data from the field trial of 170 BB and 163 BC strains over two years using these 1100 SNPs to identify high-density NCLB-resistant QTLs. In BB, QTL of the NCLB resistance was on chromosome 1 and 3 (LOD scores between 2.74 and 5.44); in BC, QTL of NCLB resistance was on chromosome 1, 2, 4, 8, and 9 (LOD scores between 2.52 and 8.53). A number of genes or genetic information related to NCLB resistance in both BB and BC were identified with the maximum number of genes/NCLB resistance-related QTL on chromosome 3 for BB and on chromosome 1 for BC. This study successfully mapped and identified NCLB-resistant QTL and genes for these 2 different maize strains, which provides insightful information for future study of NCLB-resistance and selection of NCLB-resistant maize variants.

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