After reading this article you will learn about the genetic components of variation from a diallel analysis. The methods of estimating genetic components of variation and their proportions were given by B.I. Hayman in 1954. These components and proportions are as follows: D = Additive variation. F = Measures the relative frequency of dominant and recessive alleles in the parents. [...]
The below mentioned article provides a study note on the Artificial Induction of Polyploidy. In recent years, a number of methods have been worked out to induce polyploidy in plants. Some of them are described below: 1. By Radiation: Polyploidy can be induced in plants by exposing their certain parts, such as vegetative buds and flower buds, to radiations of [...]
The following points highlight the two main causes of ploids. The causes are: 1. Aneuploidy 2. Euploidy. Ploids: Cause # 1. Aneuploidy: The individuals carrying chrornosome numbers other than somatic or diploid (2n), which are not true multiples of basic chromosome number or genome are called heteroploids or aneuploids. Thus aneuploidy results due to an addition of loss of less [...]