Identification of quantitative trait loci underlying resistance of soybean to Fusarium graminearum. (25th October 2019)

• Record Type: Journal Article
• Authors: Zhang, Chanjuan; Han, Yingpeng; Qu, Yingfan; Teng, Weili; Zhao, Xue
• Editors: Morris, Bradley
• Is Part Of: Plant breeding. Volume 139:Number 1(2020)
• Page Start: 141
• Page End: 147
• Publication Date: 2019-10-25
• Subjects: Fusarium graminearum resistance -- marker‐assistant selection -- pyramiding QTL -- quantitative trait loci -- simple sequence repeat -- soybean; Plant breeding -- Periodicals; 631.52
• DOI: 10.1111/pbr.12760
• Languages: English
• ISSNs: 0179-9541

Abstract

Abstract: Fusarium graminearum could cause serious yield loss of soybean. Host resistance could offer an economical and effective way to control F. graminearum . The aims of this study were to identify and confirm quantitative trait loci (QTLs) underlying resistance to F. graminearum, and to analyse the genetic effects of pyramid resistance QTL on resistance level. A total of 140 F2:14 recombinant inbred lines (RILs) were constructed via the cross between 'Hefeng 25' (moderate resistance to F. graminearum) and 'Conrad' (resistance to F. graminearum). The molecular genetic linkage map was constructed based on 164 simple sequence repeat (SSR) markers. A total of seven QTLs underlying F. graminearum resistance, located on six chromosomes, were identified. Among these seven identified QTLs, beneficial allele of qFG‐1, qFG‐2 and qFG‐3 derived from 'Hefeng 25' and beneficial allele of qFG‐4, qFG‐5, qFG‐6, qFG‐7 derived from 'Conrad'. Of these seven identified QTLs, qFG‐1, qFG‐3, qFG‐4 and qFG‐5 were novel for F. graminearum resistance. Four pairs of QTLs with significant epistatic effects were found. The accumulation of resistance QTL was positively correlated with decreases in disease severity index, which was valuable for improving efficiency of marker‐assistant breeding in F. graminearum resistance.