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Dn10 , a New Gene Conferring Resistance to Russian Wheat Aphid Biotype 2 in Iranian Wheat Landrace PI 682675
Author(s) -
Li Genqiao,
Xu Xiangyang,
Carver Brett F.,
Guo Peiguo,
Puterka Gary
Publication year - 2018
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci2017.10.0649
Subject(s) - russian wheat aphid , biology , hordeum vulgare , gene , chromosome , genetics , aphid , pest analysis , resistance (ecology) , poaceae , aphididae , agronomy , botany , homoptera
Russian wheat aphid [RWA, Diuraphis noxia (Mordvilko)] is a serious pest of wheat ( Triticum aestivum L.) and barley ( Hordeum vulgare L.) that causes heavy yield losses in many countries, and RWA biotype 2 (RWA2) is virulent to most RWA resistance genes. The objective of this study was to characterize a gene for resistance to RWA2 in Iranian landrace PI 682675, a single‐plant selection from PI 624151. F 2:3 and F 3:4 families derived from cross PI 682675 × Zhengyou 6 were used to map the resistance gene. PI 682675 carries a dominant resistance gene, Dn10 , flanked by simple sequence repeat markers Xgwm437 and Xwmc488 on chromosome 7DL. Physical mapping indicated that Dn10 resides in bin 7DL 0.1 to 0.77, whereas Dn2401 and Dn626580 that also confer resistance to RWA2 were physically mapped to 7DS. Allelism tests showed that Dn10 was located ∼17.4 cM from Dn2401 and 22.2 cM from Dn626580 . Dn10 is a new resistance gene that should be used widely in wheat breeding.