What is recurrent selection?

Recurrent selection is a method which involves reselection generation after generation with interbreeding of selects to provide for genetic recombination. Thus it is a cyclic selection that is used to improve the frequency of desirable alleles for a character in a breeding population.

What are the types of recurrent selection?

Many versions of recurrent selection have been developed: S0, S1, S2, full-sib, half-sib, ear-to-row, reciprocal recurrent, and reciprocal full-sib recurrent selection. These methods differ in the progeny that are evaluated in replicated field trials and in the progeny that are recombined to form the next cycle.

Why do we use recurrent selection?

Recurrent selection is commonly used by plant breeders to improve the agro-economic value of plant species grown in monoculture. In this case, selection is usually based on the performance in pure stands of progeny families of selection candidates (Figure 3).

What is marker assisted recurrent selection?

Marker-assisted recurrent selection (MARS) is a breeding method used to accumulate favorable alleles that for example confer tolerance to drought in inbred lines from several genomic regions within a single population.

What is phenotypic recurrent selection?

Abstract: The phenotypic recurrent selection aims to increase the favourable allelic frequency during successive selection cycles, which may result in an open-pollinated cultivar. For qualitative data the plants frequency for each trait was evaluated in each cycle.

What is recurrent selection heterosis?

Recurrent selection is an important breeding method employed to improve the populations of crop plants particularly those of cross-pollinated species. Inter-population improvement involves simultaneous improvement of two heterotic populations with a focus on their combining ability.

What is pedigree selection?

Pedigree selection is a breeding technique in which the breeder maintains the records of an ancestry of the cultivar which are called as Pedigree records. It helps the breeder to improve specific individuals of the progeny line, revealing genes for desired traits.

How does marker assisted selection work?

Marker-assisted breeding uses DNA markers associated with desirable traits to select a plant or animal for inclusion in a breeding program early in its development. This approach dramatically reduces the time required to identify varieties or breeds which express the desired trait in a breeding program.

What is Gene assisted selection?

Marker assisted selection or marker aided selection (MAS) is an indirect selection process where a trait of interest is selected based on a marker (morphological, biochemical or DNA/RNA variation) linked to a trait of interest (e.g. productivity, disease resistance, abiotic stress tolerance, and quality), rather than …

What is selection accuracy?

Selection Accuracy. refers to the accuracy of selecting on breeding value. • Estimated Breeding Values (EBVs) are estimates of the True. Breeding Values (TBVs), which cannot be observed directly.

Who proposed reciprocal recurrent selection?

Comstock et al.
Reciprocal recurrent selection (RRS) was originally proposed by Comstock et al. [1] to improve the hybrid between two populations to exploit additive and nonadditive effects.

What are the benefits of pedigree selection?

Merits & Demerits of Pedigree Method

• Excellent method for improvement of easily observable and high heritable characters.
• As pedigree record is maintained, information regarding inheritance pattern of characters can be obtained as and when required.
• Each plant can be traced back to its parent plant.