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 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 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 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 are the advantages of pedigree?
Advantages of Pedigree Method
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. Only those progeny lines which contain plants with desired characters are selected for next generation.
What is SSD method?
Abstract. Single-seed-descent (SSD) is a modification of conventional plant breeding used by breeders to rapidly fix genes in breeding lines. As its name implies, SSD is the advancement of one randomly selected seed per plant through the early segregating stages (Goulden 1939; Brim 1966).
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.
How do pedigree records maintain plant breeding?
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 is cattle progeny testing?
Progeny Testing refers to evaluation of bulls on the basis of their daughter’s performance. This long term and complex programme is considered to be scientifically best approach in achieving genetic improvement in a particular breed.
What is bulk population?
Bulk population breeding is a strategy of crop improvement in which the natural selection effect is solicited more directly in the early generations of the procedure by delaying stringent artificial selection until later generations.
What is a bulk method?
What is Bulk Method – Definition? It is a method which can handle segregating generations, in which F2 and subsequent generations are harvested in bulk to grow the next generation. At the end of bulking period, individual plant selection and evaluation is carried out in the similar fashion as in the pedigree method.
What is meant by heterosis?
Abstract. Heterosis refers to the phenomenon that progeny of diverse varieties of a species or crosses between species exhibit greater biomass, speed of development, and fertility than both parents. Various models have been posited to explain heterosis, including dominance, overdominance, and pseudo-overdominance.