Introduction to Ideotype Breeding
In broad sense an Ideotype model which is expected to perform or behave in a predictable manner within a defined environment. More specifically, crop Ideotype is a plant model which is expected to yield greater quantity of grains, fibre, oil or other useful product when developed as a cultivar. The term Ideotype was first proposed by Donald in 1968 working on wheat. The main points about Ideotype are given below:
1. Crop Ideotype refers to model plants or ideas plant type for a specific environment.
2. Ideotype differs from Ideotype. The former refers to a combination of various plant characters which enhance the yield of economic produce, whereas the latter refers to the morphological features of the chromosomes of a particular plant species.
3. Donald included only morphological characters to define an Ideotype of wheat, subsequently, physiological and biochemical traits were also included for broadening the concept of crop Ideotype.
4. Ideal plants or model plants are expected to give higher yield than old cultivars in a defined environment.
5. Ideotype is a moving goal which changes according to climatic situation, type of cultivation, national polley, market requirement etc. In other words, Ideotype have to be redesigned depending upon above factors. Thus, development of crop Ideotype is a continuous process.
6. Ideal plant type or model plant type also varies from species. Moreover, this is a difficult and slow method of cultivar development because various morphological, physiological and biochemical characters have to be combined a single genotype from different sources.