PATHOLOGY

Detailed explanation-1: -Some crop plants are hybrids from different genera (intergeneric hybrids), such as Triticale, × Triticosecale, a wheat–rye hybrid. Most modern and ancient wheat breeds are themselves hybrids; bread wheat, Triticum aestivum, is a hexaploid hybrid of three wild grasses.

Detailed explanation-2: -Intervarietal Hybridization: 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.

Detailed explanation-3: -Interspecific hybridization occurs when crosses are made between different cultivated species belonging to the same genus. In contrast, the outcome of the combination of a distinct genus (cultivated species with their wild relatives) is known as intergeneric hybridization.

Detailed explanation-4: -5. Multiple Cross Method: A cross-involving more than one inbred line is referred to as multiple cross. It is also known composite cross and is used to combine monogenetic characters from different sources into a single genotype.