Journal of Plant Biochemistry and Biotechnology

The significance of plant transformation for engineering novel traits and elaborating new compounds is now well demonstrated. Transgenic crops with herbicide- and or insect-tolerance are widely cultivated across all continents. The high yield of transgenics is attributable to their ability to avoid losses due to diseases and pests. Transgenic approach is regarded as appropriate for traits governed by one or a few genes but not suitable for traits like yield, which are controlled by polygenes. However, a number of recent studies have shown that single genes could make significant impact on yield. Here, I present a brief review of the progress made towards genetic engineering for increased yield. The results highlight the need for a precise regulation of key genes involved in assimilate synthesis, transport, partitioning and storage for increasing crop productivity and emphasize the relevance of transgenic approach for achieving high yields.