Which selection method is used for self-pollinated crops?
The breeding methods that have proved successful with self-pollinated species are: (1) mass selection; (2) pure-line selection; (3) hybridization, with the segregating generations handled by the pedigree method, the bulk method, or by the backcross method; and (4) development of hybrid varieties.
What is recurrent selection in plant breeding?
Recurrent selection is a variation of backcross breeding, where selection for performance is practiced within consecutive segregating progeny generations after the population has undergone selection for the major trait being transferred (Green et al., 2008).
What is recurrent selection and its types?
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… Recurrent Selection.
Who gave recurrent selection?
The procedure of recurrent selection was described by Jenkins in 1940 and the term recurrent selection was coined by Hull in 1945. Hull defined recurrent selection as reselection generation after generation with interbreeding of selects to provide for genetic recombination.
Why is pure line selection used for self pollinating crops?
Pure Line Selection: In pure line selection, large numbers of plants are selected from a self-pollinated crop and is harvested individually, individual plant progenies from them are evaluated separately and the best one is released as pure line variety. Therefore it is also known as individual plant selection.
Which breeding method is used for yield improvement in self-pollinated crop?
The most commonly used method for selection in self-pollinated species is pure line method. The purpose of breeding method is to improve the genetic potential of plant population and to increase yield.
What is recurrent selection for GCA?
Recurrent Selection for General Combining Ability (GCA): A form of recurrent selection used to important the general combining ability of a population for a character and the heterozygous tester is referred as RSGCA. It is also known as half sib recurrent selection.
What is recurrent selection for general combining ability?
What is simple recurrent selection?
Simple recurrent selection. A number of desirable plants are selected and self pollinated. Separate progeny rows are grown from the selected plants in next generation. The progenies are intercrossed in all possible combination by hand. Equal amount of seed from each cross is mixed to raise next generation.
What do you mean by recurrent and no recurrent parent?
[ri′kər·ənt ′per·ənt] (genetics) In recurrent backcrossing, the parent that is crossed with the first and the subsequent generations. Also known as backcross parent.
Why self-pollinated crops are homozygous?
self-pollination causes an increase in homozygosity in progeny in every generation of selfing up to approximately 96% in the F5, and selfing of homozygous line produce genetically similar progeny with negligible or little variability. So, the correct option is C. ( Yields progeny which are not genetically variable )
When desirable plants are selected from a mixed population in mass selection of self-pollinated crop is called?
1. Positive Mass Selection: When desirable plants are selected from a mixed population and their seeds are mixed together to grow further generation, it is referred to as positive mass selection.
What are the three methods of crop improvement?
Crop Improvement Methods
- Traditional breeding. Traditional breeding dates back thousands of years, to the earliest days of agriculture—and it’s still used today.
- Marker-assisted breeding.
- Transgenic technology.
- Gene Editing.
What is recurrent and non recurrent parent?
The variety which receives gene is ‘recipient parent’ and variety which is the source of gene is called as ‘donor parent’. Recipient parent is used repeatedly hence also named as ‘recurrent parent’. Donor parent is used only once and hence known as ‘non-recurrent parent’.
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 GCA and SCA in plant breeding?
General combining ability (GCA) is directly related to the breeding value of a parent and is associated with additive genetic effects, while specific combining ability (SCA) is the relative performance of a cross that is associated with non-additive gene action, predominantly contributed by dominance, epistasis, or …
What is non recurrent parent?
The parent of a hybrid that is not again used as a parent in backcrossing. From: nonrecurrent parent in A Dictionary of Genetics »
What are the main features of recurrent selection?
1. Application: Recurrent selection was originally developed as a method of breeding cross pollinated species. Now it is also used in self-pollinated species. However, it is more commonly used in cross pollinated species than in self-pollinated species. 2. Base Population: A heterozygous base population is required to start recurrent selection.
What is the source material for recurrent selection?
Recurrent selection was originally developed as a method of breeding in cross pollinated species. Now it is also used in self pollinated species. However, it is more commonly used in cross pollinated species than in self pollinated species. The source material may be random mating populations, synthetic cultivars,…
What is the difference between progressive selection and recurrent selection?
Progress in selection is based on the heritability of the trait and the types of genetic variation controlling the trait in the particular population under selection and on the selection differential. Recurrent selection was originally developed as a method of breeding in cross pollinated species.
What is the purpose of recurrent selection in plant breeding?
Since recurrent selection is designed to improve the frequency of favorable alleles (for the trait undergoing selection) in a population for quantitative traits, further breeding efforts are needed to release a cultivar from a recurrent selection population.