Genetic and Molecular Insights into the Enhancement of Rice Yield Potential |
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Authors: | Jong-Seong Jeon Ki-Hong Jung Hyun-Bi Kim Jung-Pil Suh Gurdev S Khush |
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Institution: | (1) Crop Biotech Institute, Kyung Hee University, Yongin, 446-701, South Korea;(2) Graduate School of Biotechnology, Kyung Hee University, Yongin, 446-701, South Korea;(3) Department of Plant Molecular Systems Biotechnology, Kyung Hee University, Yongin, 446-701, South Korea;(4) National Institute of Crop Science, RDA, Suwon, 441-857, South Korea;(5) Department of Plant Science, University of California, Davis, CA 95616, USA; |
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Abstract: | Rice is one of the most important global food crops and a primary source of calories for more than half of the world's population.
Rice production increased steadily during the green revolution era primarily as a result of introducing high-yielding rice
varieties. World rice production increased at a rate of 2.3–2.5% per year during 1970s and 1980s, but this rate of growth
was only 1.5% per year during the 1990s. The yield growth rate for rice has further declined during the first decade of this
century. However, the populations in the major rice-consuming countries continue to grow at a rate of more than 1.5% per year.
According to various estimates, world rice production must increase at the rate of 2 million tons per year. To meet this challenge,
rice varieties with higher yield potential and greater yield stability are needed. Various strategies for increasing the yield
potential of rice include; (1) conventional hybridization and selection, (2) F1 hybrid breeding, (3) modification of plant architecture, and (4) enhancement of photosynthesis. Many genes and QTLs have
recently been identified which will assist with rice breeding objectives. |
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