Excellent method for improvement of easily observable, high heritability 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 the pedigree method?
In pedigree method individual plants are selected from F2 and their progenies are tested in subsequent generations. … So each progeny inevery generation can be traced back to the F2 plant from which it isoriginated. This method used for selection from segregating population of crosses in self pollinated crops.
What are the merits of pedigree method of self pollination?
Merits of Pedigree Method: 1) This method gives maximum opportunity for breeder to use his skill and judgement for the selection of plants. 2) It is well suited for the improvement of characters, which can be easily identified and simply inherited.
What are the steps in 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 analysis in plant breeding?
A pedigree (Figure 1) is a representation of how genetically discrete individuals are related (usually but not exclusively) in time to one another. It is therefore a representation of the genetic relationship between individual plant lines, their parents and progeny (predecessors and successors).
What is the important breeding objective of rice?
The primary research objective of RES is the development of high yielding and quality rice varieties of all grain types (short, medium, long) and market classes to enhance marketing potential, reduce cost, and increase profitability of rice.
How do you maintain a pedigree?
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 advantages of mass selection?
Advantages and Disadvantages of Mass Selection
- Varieties developed by mass selection have wide adaptability, wide genetic base and stability.
- Rapid, simple and least expensive of plant-breeding procedures.
- Retains considerable genetic variability.
- Of use for the improvement of land races.
Which breeding method is not employed in cross pollinated crops?
(i) Standard selfing method:
Many lines are so poor in seed yield, pollen production, etc., that they cannot be used in a programme to produce single cross hybrid seed.
What is pedigree record?
a zootechnical document that contains information on the origin, breed, growth and development, productivity, and other qualities of pedigree animals. Pedigree records are maintained in order to standardize the data needed to appraise pedigree animals and determine their use.
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.
How are phenotypes used in pedigree analysis?
How are phenotypes used in pedigree analysis? They are used to find the genotypes as a family. What information on a pedigree can tell you whether a gene is on an autosome or on a sex chromosome? If the trait is predominantly expressed by one gender, it is likely to be a sex chromosome.