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Identification of quantitative trait loci underlying resistance of soybean to Fusarium graminearum
Author(s) -
Zhang Chanjuan,
Han Yingpeng,
Qu Yingfan,
Teng Weili,
Zhao Xue
Publication year - 2020
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1111/pbr.12760
Subject(s) - quantitative trait locus , biology , genetics , allele , fusarium , epistasis , trait , microbiology and biotechnology , gene , computer science , programming language
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 ( QTL s) underlying resistance to F. graminearum , and to analyse the genetic effects of pyramid resistance QTL on resistance level. A total of 140 F 2:14 recombinant inbred lines ( RIL s) 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 QTL s underlying F. graminearum resistance, located on six chromosomes, were identified. Among these seven identified QTL s, 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 QTL s, qFG ‐1, qFG ‐3, qFG ‐4 and qFG ‐5 were novel for F. graminearum resistance. Four pairs of QTL s 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.