Genetic improvement programs

In almost all cases, yield or productivity is the character of greatest importance or at least among the characters of greatest importance. Since yield is a quantitative trait, it is the most challenging trait to breed for in a genetic improvement program. Over... 

With a better knowledge of the inheritance of quality factors and with improved methods for screening them, the improvement of culinary and nutritive components in a program of carrot breeding and genetics is feasible. A proper perspective of quality and marketable yield must be maintained, but quality characteristics should be included in genetic improvement programs. 

The design of a genetic improvement program has the purpose of structuring groups of (test) individuals in the population such that accurate breeding values for the traits under selection can be obtained and ensuring... 

The choice of design of a genetic improvement program differs between the types of system that it is used in ... 

Table 2.6 Number of genetic improvement programs run on European aquaculture species in 2009...

Artificial fertilisation is systematically used on salmonids genetic improvement programs, even if some also rely on mass spawning. Instead, the latter technique is the most popular for species characterised by difficulties in fully mastering the artificial fertilisation like the Atlantic cod, the European seabass, the gilthead seabream and the common sole. 

Regarding the genetic improvement programs implemented (Fig. 2.1), the results show a clear preponderance of the family selection (23 out of 37) over individual based genetic improvement programs (13). 

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