Learn about the comparison between pure line selection and mass selection. Comparison # Pure Line Selection: A. Procedure: 1. The plants are selected for their desirability of characters that may not be similar phenotype. 2. The selected plants are subjected to progeny test. 3. The procedure is more effective as careful progeny test and yield trials are conducted. 4. Generally [...]
Learn about the comparison between pedigree method and back-cross method. Comparison # Pedigree Method: 1. The aim of this method to produce the new variety which is totally different from the parents bearing superior characters. 2. The method is used generally to improve the yield and other characters of the variety. 3. This method is useful to improve both qualitative [...]
Learn about the comparison between inbreeding depression and hybrid vigour. 1. Increase in Homozygosity vs. Development of Heterozygosity: Due to inbreeding each line becomes increasingly homozygous, as a consequence the variation within a line decrease rapidly. After 7-8 generations of selfing, the lines becomes almost uniform (99% homozygosity) which are called inbred lines. Hybridization always favours hetrozysity; the species which [...]