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Abstract

Heterosis, or hybrid vigor, occurs when hybrid performance exceeds that of either parent. Heterosis occurs in animals and is particularly common in plants. It is probably important in evolution since heterozygote superiority may ensure the maintenance of genetic polymorphism in natural populations. Further, heterosis is extremely important to agriculture and horticulture and is of increasing importance in forestry. The dramatic yield improvements in cereal crops in the twentieth century have been, in large part, due to the utilization of heterosis. Inbreeding depression refers to the reduction in phenotypic vigor following self-fertilization and is the complementary process to heterosis.

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© 1987 Martinus Nijhoff Publishers, Dordrecht

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Rood, S.B., Pharis, R.P. (1987). Hormones and Heterosis in Plants. In: Davies, P.J. (eds) Plant Hormones and their Role in Plant Growth and Development. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-3585-3_24

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  • DOI: https://doi.org/10.1007/978-94-009-3585-3_24

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-90-247-3498-6

  • Online ISBN: 978-94-009-3585-3

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