Pedigree refers to record of the ancestry of an individual selected plant. Pedigree breeding is a method of genetic improvement of self-pollinated species in which superior genotypes are selected from segregating generations and proper records of the ancestry of selected plants are maintained in each generation.
What are the steps of pedigree method?
Crossing between selected parent plants is the first step in pedigree method. Seeds obtained by hybridization (F1 seeds) are planted with proper sowing distance. Seeds of about 20-30 plants are harvested in bulk and forwarded to grow F2 generation. Selection is the main process carried in this step.
What is pedigree method in agriculture?
Pedigree method. In this method, individual plants are selected from F2 and subsequent generations and their progenies are tested. During this process details about the plants selected in each generation is recorded in Pedigree Record.
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.
What is family selection in plant breeding?
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…
Who give pedigree method?
It is a modification of pedigree method. It was proposed by Harrington in 1937. Mass pedigree method refers to growing of segregating material by bulk (mass) method when conditions are unfavourable for selection and use of progeny testing (Pedigree method) when conditions are favourable for selection.
What are the method of breeding?
System of breeding. Basically, there are two methods of breeding which are as follows: Inbreeding : Breeding of the related animals as sire (male) and dam (female) are known as inbreeding. Out breeding : Out breeding of unrelated animals as male and female is known as out breeding.
What is backcross method?
Backcross breeding enables breeders to transfer a desired trait such as a transgene from one variety (donor parent, DP) into the favored genetic background of another (recurrent parent, RP). If the trait of interest is produced by a dominant gene, this process involves four rounds of backcrossing within seven seasons.
Which of these is a disadvantage of pedigree selection?
Disadvantages of Pedigree Method
Pedigree record maintenance is time consuming. Selection for yield or other characters in F2 and F3 is ineffective. One important to note is genetic variation available for selection gets decreased in later generations due to the individual plant selection carried out earlier.