In this article we will discuss about:- 1. Manifestation of Heterosis 2. Genetic Basis of Heterosis 3. Applications. Manifestation of Heterosis: Performance or expression of any character or trait is influenced by many genetic factors — some are positive (stimulating) and others are negative (decreasing). Expressivity of the genes or the degree of manifestation of a character is the result [...]
The following points highlight the top two methods of plant breeding. The methods are: 1. Mutation Breeding 2. Haploid/Monoploid Breeding. Method # 1. Mutation Breeding: Mutation is a sudden heritable change in the genotype of an organism. The process by which the change does occur is called mutation and the individual in which it is observed is called mutant. Mutation [...]
The following points highlight the four main steps of hybrid seed production. The steps are: 1. Choice and Development of Seed Parent (A-Line) 2. Choice and Development of Restorer or Male Parent (R-Line) 3. Maintenance and Multiplication of Parental Seeds 4. Production and Improvement of F1 Hybrids. Step # 1. Choice and Development of Seed Parent (A-Line): The seed parent [...]