Question

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$give \: me \: some \: informations \: about \: \\ type \: \: of \: hybridization \: in \: plant$
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Answer 1

1. Intervarietal Hybridization:

The parents involved in hybridization belong to the same species; they may be two strains, varieties or races of the same species. It is also known as intraspecific hybridization. In crop improvement programmes, intervarietal hybridization is the most commonly used. An example would be crossing of two varieties of wheat (T. aestivum), rice (O. Sativa) or some other crop. The intervarietal crosses may be simple or complex depending upon the number of parents involved.

2. Distant Hybridization:

This includes crosses between different species of the same genus or of different genera. When two species of the same genus are crossed, it is known as inter-specific hybridization; but when they belong to two different genera it is termed as intergeneric hybridization. Generally, the objective of such crosses is to transfer one or few simply inherited characters like disease resistance to a crop species.

Sometimes, interspecific hybridization may be used for developing a new variety, e.g., Clinton oat variety was developed from a cross between Avena sativa x A. byzantina (both haploid oat species), and CO 31 rice variety was developed from the cross Oryza sativa var. indica x O. perennis.

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