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Genetics and Genomics of Rice pp 255–268Cite as

Heterosis

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Part of the book series: Plant Genetics and Genomics: Crops and Models ((PGG,volume 5))

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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Acknowledgements

Supported by a grant from the National Natural Science Foundation of China (30921091).

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Authors and Affiliations

  1. National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, China

    Dan Zhu & Qifa Zhang Ph.D.

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  1. Dan Zhu
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  2. Qifa Zhang Ph.D.
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Correspondence to Qifa Zhang Ph.D. .

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Editors and Affiliations

  1. of Crop Genetic Improvement, Huazhong Agricultural University National Key Laboratory, Wuhan, China, People's Republic

    Qifa Zhang

  2. The School of Plant Sciences, University of Arizona Arizona Genomics Institute, Tucson, Arizona, USA

    Rod A. Wing

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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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