Abstract
The large-scale adoption of hybrid rice in China over the past 4 decades, and in India, Bangladesh, Vietnam, and other Asian countries in recent years, has greatly contributed to improved food availability and farmers’ profitability in these countries [1]. The superior performance, or heterosis, of elite hybrids is usually featured by two important characteristics. First, elite hybrids possess greatly elevated yield potential. As much as 100 % or greater mid-parent heterosis (=F1 – MP, where MP is the mean of the parents) and over 40 % high-parent heterosis (=F1 – HP, where HP is the higher parent value) have been frequently observed in experimental plots [2–5]. It has been estimated that hybrids can outyield conventional cultivars by 30–40 % in production fields [6]. Second, elite hybrids often show wider adaptability, due to more resistance to biotic and abiotic stresses than inbreds, and thus perform more stably.
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Supported by a grant from the National Natural Science Foundation of China (30921091).
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Zhu, D., Zhang, Q. (2013). Heterosis. In: Zhang, Q., Wing, R. (eds) Genetics and Genomics of Rice. Plant Genetics and Genomics: Crops and Models, vol 5. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7903-1_17
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DOI: https://doi.org/10.1007/978-1-4614-7903-1_17
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