Bulk Method/Breeding Methods (PART-6)

Bulk Method/Mass Method/Population Method:
This method was proposed by Nilsson-Ehle in 1908 at Savlof. (JRF 2014)
In this method, F, and subsequent generations are harvested in mass or bulk to rise the next generation, at the end of bulking period individual plants are selected and evaluated in a similar manner as in the pedigree method. The crucial difference between pedigree and bulk method lies in the manner innwhich segregating generations are handled. There are three main applications of bulk method of breeding:
1. Isolation of homozygous line, which is a most common use with minimum efforts. Generally takes For F, generations.
2. Waiting for the opportunity of selection, such as selection for disease resistance, lodging and different tolerances as this method can last up to several generations. This method is generally known as the mass-pedigree method of Harlen.
3. Opportunity for natural selection may be providing. After F, natural selection would act on homozygous plants and would change the frequency of homozygous genotypes present in the population. As the method takes the evolutionary steps it was called Evolutionary method of breeding by Suneson. Up to the generation F, to F, planting is done at the commercial seed rates and spacing
Selected bulk method was given by CIMMYT in 1990.

Participatory Crop Improvement
   • Participatory Crop Improvement  

Pedigree Method/Breeding Methods (PART-5)
   • Bulk Method/Breeding Methods (PART-6)  

Pureline Selection/Breeding Methods (PART-4)
   • Pureline Selection/Breeding Methods (PART-4)  

Mass Selection/Breeding Methods (PART-3)
   • Mass Selection/Breeding Methods (PART-3)  

Difference Between Male Sterility and Self Incompatibility
   • Difference Between Male Sterility and Self...  

Gametophytic Self Incompatibility vs Sporophytic Self Incompatibility/Self Incompatibility (PART-4)
   • Gametophytic Self Incompatibility vs Sporo...  

Sporophytic Self Incompatibility/Self Incompatibility (PART-3)
   • Sporophytic Self Incompatibility/Self Inco...  

Gametophytic Self Incompatibility/Self Incompatibility (PART-2)
   • Gametophytic Self Incompatibility/Self Inc...  

Heteromorphic Self Incompatibility/Self Incompatibility (PART-1)
   • Heteromorphic Self Incompatibility/Self In...  

Wheat Rust Life Cycle/Disease of Field Crops
   • Wheat Rust Life Cycle/Disease of Field Crops  

Plant Introduction/Breeding Methods (PART-2)
   • Plant Introduction/Breeding Methods (PART-2)  

Centres of Origin & Law of Homologous Series in Variation
   • Plant Introduction/Breeding Methods (PART-2)  

Types of Selection/Breeding Methods
   • Types of Selection/Breeding Methods (PART-1)  

How to remember Brassica Triangle in Five minutes ?
   • How to remember Brassica Triangle in Five ...  

Barnase-Barstar Transgenic Genetic Male Sterility/Pollination Control
   • Barnase-Barstar Transgenic Genetic Male St...  

Genetic Male Sterility (GMS) /Pollination Control
   • Genetic Male Sterility (GMS) /Pollination ...  

Cytoplasmic Male Sterility (CMS) & Cytoplasmic Genetic Male Sterility (CGMS)/Pollination Control
   • Cytoplasmic Male Sterility (CMS) & Cytopla...  

History of Plant Breeding/Introduction to Plant Breeding
   • History of Plant Breeding/Introduction to ...  


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