Pedigree Selection

Pedigree selection

1. Submitted to:- Dr. Khursheed Hussain Course title:- Breeding of vegetable crops Course No.:- VSC-503 Credit load::- 2+1

2. Assignment on PEDIGREE SELECTION

3. INTRODUCTION The pedigree method was first outlined by Love in 1927. in this method, individual plants are selected from F2 and subsequent generations, there progenies are grown, and a record of all the parent-offspring relationships is maintained. Individual plant selection is continued till the progenies become homozygous, and they show no segeration .

4. Pedigree record In pedigree method, a detailed record of the relationships between the selected plants and there progenies is maintained; such a record is known as pedigree record are simply pedigree. The pedigree is helpful in finding out if two individual are related by descent, i.e have a common parent in their ancestry, and therefore are likely to have some alleles in common.

5. Applications of pedigree method Pedigree method is the most commonly used method for selection from segregating generations of crosses of self pollinated crops. This method is often used to correct some specific weaknesses of an established variety. This method is suitable for improving specific characteristics, such as disease resistance, plant height, maturity time, yield etc.

6. Procedure for pedigree method Hybridization F1 generation F2 generation F3 generation F4 generation F5 generation F6 generation F7generation F8 to F10 generation F11 generation

7. A simplified schematic representation of pedigree method

8. Merits It is well suited for the improvement of easily identified and simply inherited characters. It takes less time then the bulk method to develop a new variety. Plants and progenies with visible defects and weaknesses are eliminated at an early stage in the breeding programme, this saves resourses and the time of breeders.

9. Demerits Maintenance of accurate pedigree records takes up valuable time. Sometimes it may be a limiting factor in a large breeding programme. The success of this method largely depends on skill of the breeder. There is no opportunity for natural selection to influence the populations.

10. thank you