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H33 : A Wheat Gene Providing Hessian Fly Resistance for the Southeastern United States
Author(s) -
McDonald Melissa J.,
Ohm Herbert W.,
Rinehart Kristen D.,
Giovanini Marcelo P.,
Williams Christie E.
Publication year - 2014
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/cropsci2013.12.0811
Subject(s) - biology , gene , resistance (ecology) , common wheat , genetics , cultivar , cecidomyiidae , chromosome , botany , agronomy , larva
Hessian fly populations adapt to overcome newly deployed resistance genes within a few years of release. Although more than 34 genes have been identified that confer resistance against Hessian fly [ Mayetiola destructor (Say)] attack in wheat ( Triticum aestivum L.), only five genes currently provide resistance against fly populations in the southeastern United States. But even these genes are not 100% effective, leaving Georgia and North and South Carolina with between one and three effective genes for cultivar development. With the goal of providing much needed resistance for this region in a wheat line suitable for use with marker‐assisted selection, we identified a durum wheat line that confers resistance to Hessian fly populations from Maryland, Delaware, North and South Carolina, and Georgia in 100% of the plants tested. Resistance from this tetraploid durum line, PI 134942, was introgressed into hexaploid common wheat to generate the line 97211. Segregating populations of F 2:3 families were constructed with the durum donor and with the common wheat recipient to identify resistance genes and provide flanking markers. Although the resistance of the durum donor appeared to involve more than one gene, one partially dominant but very effective gene, H33 , was successfully transferred and identified in the hexaploid recipient. This gene was mapped to the short arm of wheat chromosome 3A and is flanked by single sequence repeat markers xgwm218 and hbg284.