GENRR2Y soybeans offer 7-11% higher yield than first generation RR varieties, based on multiple comparisons over a range of trial years and locations. One key element to this yield advantage is the ability of RR2 varieties to produce more seeds per pod and more pods per plant.
GENRR2Y soybeans require no change in management practices. You use the same crop inputs and spray regime as RR varieties. You experience the same weed control as RR varieties. However, GENRR2Y have a much higher yield potential.
With first generation Roundup® (glyphosate) resistance, the gene for resistance was inserted into the soybean genome randomly. With GENRR2Y technology the gene for Roundup resistance is linked to a new gene for yield and this combination is inserted in the soybean genome. GENRR2Y soybeans are sure to out-yield first generation RR soybeans.
RR1 vs. GENRR2Y
The glyphosate resistance gene (Roundup) in the first version of the technology (RR1) was randomly introduced into the soybean genome. In GENRR2Y technology the Roundup resistance gene was linked to a gene for yield and inserted into the soybean genome. Thus, GENRR2Y represents two technologies that work together:
- Glyphosate-resistance technology allows you to spray Roundup herbicides.
- The RR gene is positioned in relation to a yield gene identified through gene mapping.
The yield gene identified through gene mapping produces varieties with more pods per plantand more beans per pod.
How the two technologies work together
When creating a new variety through cross-breeding, the DNA is broken into pieces and randomly reassembled with portions of the mother’s and father’s DNA. If two genes are very close to one another, they will be found on the same piece of DNA.
In the case of GENRR2Y technology, it is always associated with superior yield, thanks to this associated gene. The genes are said to be linked.
Outcome of cross-breeding RR1 vs. GENRR2Y
In the case of RR1, three outcomes are possible:
- RR alone, with no yield enhancement
- Yield alone without RR (no resistance to glyphosate)
- RR plus yield (in a small percentage of cases)
With GENRR2Y, there is only one possible outcome. The RR gene is associated with yield every time.