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fish selective breeding method
By juragan | 13 Juli 2008
july 7
individual/mass selection
at least 50 mating pairs in a same spawning time, growing up in a same pond and select the 50 best pairs for next generation spawning
family selection
at least 50 mating pairs in a same spawning time, growing up each family separately and select the 10 best families for next generation spawning
within family selection
at least 50 mating pairs, not necessary in a same spawning time, growing up each family separately and select the best pairs in each family for next crosses spawning.
combined selection
at least 50 mating pairs in a same spawning time, growing up each family separately and select the best pairs in 10 best families for next crosses spawning.
tandem selection
different batch selected at different time
independent culling level (ICL)
different batches selected at same time, require minimum standard of each trait
index selection
different batches selected at same time, consider selection index of each trait including important parameters such as heritabilities, economic values, genetic correlation between traits etc.
recapped from: Supattra Uraiwan
juragan@9300i.bkk
Topics: thai notes |
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