Summary
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.
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References
Frey, K. J., 1975. Breeding concepts and techniques for selfpollinated crops. In: International workshop on grain legumes. pp. 257–278. ICRISAT, Begumpet, Hyderabad 500016 (A. P.), India.
Ishizumi, K., 1976. On the variety Koshihikari and its sister varieties. In: Breeding of rice varieties. pp. 73–196. Fuji Shuppan, Tokyo. (in Japanese).
Kushibuchi, K., 1976. Method of rice breeding (and personal communication). In: Breeding of rice varieties. pp. 1–38. Fuji Shuppan, Tokyo. (in Japanese).
Palmer, T. P., 1953. Progressive improvement in self-fertilized crops. Heredity 7: 127–129.
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Yonezawa, K., Yamagata, H. On the number and size of cross combinations in a breeding programme of self-fertilizing crops. Euphytica 27, 113–116 (1978). https://doi.org/10.1007/BF00039125
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DOI: https://doi.org/10.1007/BF00039125