Eight aphid resistance sources were crossed with elite Michigan soybean germplasm. Over 10,000 plants developed from these crosses were evaluated for aphid resistance in the past four years. Progenies with different aphid resistant genes were selected and crosses were made among the selected progenies to stack multiple aphid resistant genes. In 2011, over 650 lines from crosses attempting to combine different aphid resistance genes were evaluated for aphid resistance in the field and in the greenhouses.
Over 380 lines were found resistant to soybean aphids. These resistant lines were tested with DNA markers linked to different aphid resistance genes to determine the aphid resistance...
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#breeding & genetics