New Zealand Institute for Crop & Food Research Limited

New Zealand Institute for Food and Crop Research Limited

Her Majesty the Queen in Right of New Zealand, C/o Dept. of Scientific

Anthony John Conner

Thomas Pattinson Palmer

The invention provides a method for biasing a crop plant which is heterozygous for a transgene towards the production of seeds which carry the transgene comprising the step of contacting the crop plant containing a gene construct comprising the transgene coding for resistance to a specific phytotoxin with the specific phytotoxin one or more times during the life of the crop plant. The method achieves this through selective inhibition of phytotoxin-sensitive plant ovules, embryos and pollen. The method has particular application to the production of open pollinated and synthetic varieties of crop plants, such as alfalfa synthetic varieties.

True breeding transgenics from plants heterozygous for transgene insertions

True breeding transgenics from plants heterozygous for transgene

The invention relates to improved methods of hybrid seed production. More particularly it relates to the use of one (or two) phytotoxic chemical resistant genes in the male (and female) parent in a hybridization process, followed by uncontrolled pollination and dosing the resultant hybrids with the one (or two) phytotoxic chemicals to eliminate plants arising from unwanted contaminating seeds and thus producing pure F.sub.1 hybrids.

Growing community of inventors

Christchurch, New Zealand

Anthony John Conner