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 is pedigree method of selection?
In pedigree method individual plants are selected from F2 and their progenies are tested in subsequent generations. … This method used for selection from segregating population of crosses in self pollinated crops. It is used for combination or transgressive breeding.
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 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.
In which generation would you start selection in pedigree method?
Bulk inbreeding in the F2 and F3 generations is used by some breeders to inexpensively produce relatively uniform lines in which to begin pedigree selection. Pedigree selection should focus only on highly heritable, easily-scored traits.
Why pedigree method is important?
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.
How do we maintain pedigree record?
In keeping a pedigree record, the following should be kept in mind.
- Only important characteristics should be recorded. If a large number of characters are noted, the record keeping would become a great burden.
- Only promising progenies should be included in the record. …
- The pedigree record must be accurate.
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 the basis of mass selection?
In mass selection, a number of individuals chosen on the basis of appearance are mated; their progeny are further selected for the preferred characteristics, and the process is continued for as many generations as is desired.
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.