What is open nucleus breeding system?

What is open nucleus breeding system?

The basic idea of Open Nucleus Breeding System (ONBS) using Multiple Ovulation and Embryo Transfer (MOET) is to set an elite herd (or a few elite herds) of males and females and carry out intensive selection and testing within herd/s selecting males and females at an early age using family information and not on their …

What is onbs?

ONBS means “Orre News Broadcasting Station (Pokemon)”.

What is a breeding unit?

1 the process of bearing offspring; reproduction. 2 the process of producing plants or animals by hybridization, inbreeding, or other methods of reproduction. 3 the result of good training, esp. the knowledge of correct social behaviour; refinement. a man of breeding.

What are the steps involved in animal breeding?


  • Locate and heavily utilize one or more animal breeding advisors or counselors.
  • Develop a plan.
  • Pursue your plan aggressively.
  • Commit to research and development.
  • Revisit your plan.

What is Tandem method of selection?

Tandem selection is a multi-trait method of artificial selection in which useful traits are selected for sequentially. it means selection for one trait is followed by selection for another trait.

What is sire evaluation?

Introduction. Sire evaluation can logically be formulated as a process of prediction of future progeny of a sire produced by matings with specified females and making their records in some specified environment.

What is the purpose of stock breeding?

Breeding stock is a group of animals used for the purpose of planned breeding.

What are the types of breeding?

Basically, there are two methods of breeding which are as follows:

  • Inbreeding : Breeding of the related animals as sire (male) and dam (female) are known as inbreeding.
  • Out breeding : Out breeding of unrelated animals as male and female is known as out breeding.

What are the 3 methods of breeding?

Purebreds with a recognizable lineage are known as pedigreed, while a mix of two separate purebreds will produce crossbreeds. The three methods of selective breeding are outcrossing, inbreeding and line breeding.

What is the breeding process?

Breeding is sexual reproduction that produces offspring, usually animals or plants. It can only occur between a male and a female animal or plant. Breeding may refer to: Breeding in the wild, the natural process of reproduction in the animal kingdom.

What is basis of selection?

The amount of genetic improvement gained depends on four factors: (1) heritability of the trait, (2) amount of selection pressure, (3) genetic association of selected traits, and (4) generation interval. Differences between animals result from genetic and envi- ronmental causes.

What is the pedigree method?

The pedigree method describes a selection protocol utilized during the inbreeding of populations of self- and cross-pollinated species in the development of homozygous lines.

How does open nucleus breeding scheme ( onbs ) work?

The ONBS concept comprises a nucleus herd established under controlled conditions to facilitate selection. The nucleus is established from the elite animals selected from the base population. These are then recorded individually and the best animals are selected to form the elite herd of the nucleus.

What does it mean when a breeding program is closed?

This results in a high genetic improvement rate over generations. Nucleus programs can be closed, as is the case in commercial pig and poultry breeding. Once the breeding animals for the nucleus are chosen at the start, no animals from outside the nucleus are added to the nucleus population. It is called a closed nucleus breeding program.

Which is the optimal structure for a nucleus breeding system?

In sheep and beef cattle breeding the optimal structure would be to have about 10% of the population in the nucleus, to get half of the nucleus female replacements from the base population, and to use all nucleus-born females not needed as nucleus replacements for breeding in the base population.

What kind of bulls are used in nucleus?

Charolais, Simmental and Santa Gertrudis bulls are used as the major terminal sire breeds, being bred on Landcorp Farming Ltd’s four performance-selected nucleus breeding herds (totalling 550 cows). Similar systems are now being established for the Corporation’s sheep and deer populations.