Development of hybrid rice cultivation in world: a review of breeding and biotechnology
Journal Title: International Journal of Farming and Allied Sciences - Year 2015, Vol 4, Issue 2
Abstract
Heterosis, or hybrid vigor, refers to the phenomenon that progeny of diverse inbred varieties is superior over both parents on yield, panicle size, number of spikelets per panicle, number of productive tillers, stress tolerance etc. This phenomenon to be a powerful force in the evolution of plants has been exploited extensively in crop production. In fact, the exploitation of heterosis has been the greatest practical achievement of the science of genetics and plant breeding.Rice heterosis was first reported by Jones (1926) who observed that some F1 hybrids had more culms and greater yield than their parents. Between 1962 and 1967, a number of suggestions came from different places of the world for commercial exploitation of heterosis to become a major component of rice improvement programs at national and international level. For example, rice breeders from Japan, China, United States, India, the former Soviet Union and Philippines started their projects to utilize rice heterosis. However, progress had not been sound because of the difficulty for rice to be a strictly self-pollinated crop unlike corn, which made out crossing absolutely essential for hybrid seed production extremely difficult.
Authors and Affiliations
Ali Sattari, Baratali Fakheri, Nafiseh Mahdinezhad, M. Noroozi, Marya Saiydi and Yaser Ghazi
Keywords
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