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 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 mass selection method?
In mass selection, seeds are collected from (usually a few dozen to a few hundred) desirable appearing individuals in a population, and the next generation is sown from the stock of mixed seed. This procedure, sometimes referred to as phenotypic selection, is based on how each individual looks.
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 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 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 dog breeding?
An AKC Pedigree is a printed or electronic document that displays the lineage of an AKC dog and important information about the ancestors in a dog’s family tree.
What is bulk method in plant 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.
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.
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 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.