- Which method is used for population improvement?
- What is mass selection?
- What is single seed descent method?
- What is reciprocal recurrent selection?
- What is selection method in plant breeding?
- How pedigree selection is done?
- Who gave pedigree method?
- What is pure line selection?
- What is back cross method?
- What is meant by family selection?
- What is population improvement?
- What is mass pedigree method?
- What is pedigree selection?
- Who proposed pedigree method?
- What is bulk method of breeding?
- Which method is used for development of Oligogenic trait?
- How is mutation breeding done?
- What is heterosis breeding?
- What is pure line?
- Which breeding method is suitable for waiting for selection opportunity?
- What are the basic requirements of backcross method?
Which method is used for population improvement?
Recurrent selection is an important breeding method employed to improve the populations of crop plants particularly those of cross-pollinated species.
It may be undertaken in one (intra-population improvement) or two populations (inter-population improvement) to upgrade the performance per se or combining ability..
What is mass selection?
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.
What is single seed descent method?
SINGLE SEED DESCENT METHOD This is the classic procedure of having a single seed from each plant, bulking the individual seeds, and planting out the next generation. It is a method of inbreeding a segregating population that is quite conducive to environments that are not typical.
What is reciprocal recurrent selection?
Reciprocal recurrent selection (RRS) is a cyclical breeding procedure designed to improve the cross of two populations from different heterotic groups by using both general and specific combining ability.
What is selection method in plant breeding?
Selection Method for Crop Improvement: It can be defined as preservation of certain individual plants of desirable characters. In simplest form selection means choosing plants of one’s choice. It is the basis of all crop improvement. Even today it is most common method of crop improvement among the cultivators.
How pedigree selection is done?
Applications of pedigree method Pedigree method is the most commonly used method for selection from segregating generations of crosses of self pollinated crops. This method is often used to correct some specific weaknesses of an established variety.
Who gave pedigree method?
The term was first utilized to describe the protocol used at Svalof, Sweden in the late 1890’s whereby desirable single plants were selected from heterogeneous landrace populations. Seed from a selected plant was grown in its own row the following generation (‘plant-to-row”, “head-to-row”, “ear-to-row”).
What is pure line selection?
Pure-line selection involves selecting and breeding progeny from superior organisms for a number of generations until a pure line of organisms with only the desired characteristics has been established.
What is back cross method?
Backcrossing is a crossing of a hybrid with one of its parents or an individual genetically similar to its parent, in order to achieve offspring with a genetic identity which is closer to that of the parent. It is used in horticulture, animal breeding and in production of gene knockout organisms.
What is meant by family selection?
Family selection refers to mating of organisms from the same ancestral stock that are not directly related to each other. Pure-line selection involves selecting and breeding progeny from superior organisms for a number of generations until a pure line of organisms with only the desired…
What is population improvement?
Accumulation of desirable alleles in a population through various breeding techniques is known as population improvement and those breeding procedures that are used for such work are referred to as population improvement approaches… … In plant breeding, following four approaches are used for population improvement.
What is mass pedigree method?
Mass Pedigree method. This method consists of selection among individual plants and their progeny during inbreeding following crosses between selected donor parents. The parents are normally crossed in a single cross system. The F2 populations are subjected to selection for apparent desirable traits viz.
What is pedigree selection?
Pedigree selection is a breeding method in which the breeder keeps records of the ancestry of the cultivar. The base population, of necessity, is established by crossing selected parents, followed by handling an actively segregating population.
Who proposed pedigree method?
William FarrerWilliam Farrer of Australia developed many important wheat varieties during the late 19th century using a precursor of the pedigree method that featured hybridization to combine desirable characters of two cultivars (Hayes et al., 1955).
What is bulk method of breeding?
Bulk breeding refers to a selection procedure in which the segregating population of self-pollinated species is grown in bulk plot (From F1 to F5) with or without selection, a part of the bulk seed is used to grow the next generation and individual plant selection is practised in F6 or later generations.
Which method is used for development of Oligogenic trait?
Because oligogenic characteristics are governed by a few genes with large effects, the OTMM is the most appropriate method for OTL analysis for these characteristics.
How is mutation breeding done?
Mutation breeding, sometimes referred to as “variation breeding”, is the process of exposing seeds to chemicals or radiation in order to generate mutants with desirable traits to be bred with other cultivars. … Plants created using mutagenesis are sometimes called mutagenic plants or mutagenic seeds.
What is heterosis breeding?
Heterosis refers to the phenomenon that progeny of diverse varieties of a species or crosses between species exhibit greater biomass, speed of development, and fertility than both parents. From: Induced Fish Breeding, 2017.
What is pure line?
The definition of a pure line is a result of inbreeding where animals or plants have certain characteristics that are the same through generations. An example of a pure line is the result of inbreeding of a certain flower to help it fight off diseases. noun.
Which breeding method is suitable for waiting for selection opportunity?
This method is also known as “Mass Method” or the “The Population Method”. Bulk population breeding is a strategy of crop improvement in which the natural selection effect is solicited more directly in the early generations of the procedure by delaying stringent artificial selection until later generations.
What are the basic requirements of backcross method?
Requirement of back cross breedingSuitable recurrent parent must be available which lacks in one or two characteristics.A suitable donor parent must be available, the character must be highly intense.Character to be transferred must have high heritability controlled by one or two genes.More items…•Mar 13, 2012