Resistance to Fusarium Head Blight in Wheat Genetic Model Analysis of Major Effect QTL Fhb4 and Fhb5

doi:10.7668/hbnxb.2015.05.005

Abstract

Abstract: For characterizing the genetics interactions between Fhb4 and Fhb5,during the BC₃F₁ and BC₃F₂ generations,the wheat lines carried this two QTLs had been identified and evaluated for the resistance to wheat scab under surface of soil inoculation conditions combined with spraying spores compared to CK-R and CK-S,according to percentage of diseased spikelet.The results showed that there was no significant difference between heterozygous genotypes and donor parents in contrast to recurrent parents under Wenmai 6 and Zhoumai 22 genetic background,respectively.Furthermore,the resistance segregation was 9:3:3:1,so Fhb4 and Fhb5 were two independent of each other dominant Mendelian inheritance factor.Moreover,there was a notable additive effect between Fhb4 and Fhb5 when they were accumulated in individual plant,and presented similar resistance effect to penetration.Therefore,pyramiding Fhb4 and Fhb5 would improve the basal resistance to FHB in breeding practice.

Key words: Wheat, Fusarium head blight, Disease resistance, Backcross, Percentage of diseased spikelet

CLC Number:

XU Feng, YAN Su-hui, ZHANG Cong-yu, SHI Xia-qing, LI Wen-yang, ZHANG Zi-xue. Resistance to Fusarium Head Blight in Wheat Genetic Model Analysis of Major Effect QTL Fhb4 and Fhb5[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2015, 30(5): 30-35. doi: 10.7668/hbnxb.2015.05.005.

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