One way of incorporating desired characters into crop varieties is hybridization. In this process, there is crossing between genetically dissimilar plants. Which one of the following crossings will not refer to hybridization?

Hybridization in plant breeding is the process of crossing genetically dissimilar plants to combine desirable traits [1]. It is classified based on the taxonomic relationship between the parents. Intervarietal hybridization involves crossing two different varieties of the same species. Interspecific hybridization involves crossing plants from two different species within the same genus [1]. Intergeneric hybridization is a wide cross between plants belonging to two different genera [1]. These three types involve crossing distinct genetic entities (varieties, species, or genera). In contrast, 'intragenic' refers to processes occurring within a single gene, such as intragenic recombination or mutations, rather than a cross between genetically dissimilar plants. Therefore, intragenic does not refer to a type of hybridization in the context of plant breeding taxonomy.

Sources

1. [1] https://igntu.ac.in/eContent/MSc-Botany-02Sem-DrAniruddh.pdf