How is mass selection used in crop improvement?
Mass selection refers to a methods of crop improvement in which individual plants are selected on the basis of phenotype from a mixed population, their seeds are bulked and used to grow next generation. The oldest methods of crop improvement Applicable to both self and cross pollinated species.
Which is the best definition of mass selection?
2. Mass selection refers to a methods of crop improvement in which individual plants are selected on the basis of phenotype from a mixed population, their seeds are bulked and used to grow next generation. The oldest methods of crop improvement Applicable to both self and cross pollinated species. Mass selection 3.
What is the genetic constitution of mass selection?
4. 1. Genetic constitution :- Self pollinated crops:- A mass selected variety is homozygous but heterogeneous because it is mixture of several pure line. Cross pollinated crops:- variety is mixture of homozygous and heterozygous and variety is heterogeneous.
How is the grid method of mass selection modified?
Modification of mass selection 20. Also known as grid method of mass selection This method is suggested by Gardner in 1961 Field is divided into several small plots, e.g., having 40-50 plants each. Superior plant are selected in each small plot. Seeds are selected and composite to raise the next generation. 3) Stratification of field-
How does mass selection work in animal breeding?
Mass selection is based on ranking the animals on their own performance. The success of mass selection is dependent on the heritability of the trait under selection.
How is progeny selection different from mass selection?
This type of selection is a refined version of the mass selection procedure and differs as follows: Individuals selected on basis of the progeny test data are crossed with each other in every possible way to produce seed to form the new base population.
What are the different types of selection in breeding?
Types of selection are individual or mass selection, within and between family selection, sibling selection, and progeny testing, with many variations. Within family selection uses the best individual from each family for breeding.
How is genomic selection used in animal breeding?
This is intuitively an appealing approach because much more of the DNA can be evaluated; perhaps in the future the entire genome can be used to evaluate animals. This method of selection, called genomic selection, is now being applied to dairy cattle, but results are not yet available.
