For these pure lines, the patents/PBRs are available, but their implementation 'seems to be really difficult (if re-use of seed is not allowed), particularly in the developing world having millions of small resource-poor farmers.
In countries like USA also, private companies are having difficulties with the farmers, who are saving for replantation, the seeds from their own crops, raised from the seed purchased from these companies in view of these inherent difficulties in the implementation of patents/PBRs in these self-pollinated crops, the terminator technology was intended to be used.



