On the number and size of cross combinations in a breeding programme of self-fertilizing crops
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- Yonezawa, K. & Yamagata, H. Euphytica (1978) 27: 113. doi:10.1007/BF00039125
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The number and size of crosses in a breeding programme were discussed to the conclusion that the number of crosses rather than the size of a cross should be increased with a given total population size. The advantage due to this manipulation, however, is relatively small when such genotypes as improved for many (twenty-five or more) loci are to be obtained, or when a high proportion (around 0.1 or more) of available combinations have the potentiality of releasing the objective genotypes. In such a case, the ease with which crossing and cultivation can be carried out becomes the decisive factor.