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  • 1985-1989  (1)
  • 1986  (1)
  • Solanum tuberosum  (1)
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  • 1985-1989  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied genetics 73 (1986), S. 218-222 
    ISSN: 1432-2242
    Keywords: Solanum tuberosum ; Selection efficiency ; Potato breeding ; Yield ; Yield components
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A number of unselected potato (Solanum tuberosum L.) clones were grown at two locations (a seed site and a ware site) in three consecutive years. The repeatability of total yield and yield components in the first two clonal years was compared with the same characters recorded in the third clonal year. Selection for yield in the first clonal year was only marginally more effective than a random reduction in number of genotypes, while selection in the second clonal year appeared to be somewhat more effective as judged by performance in the third clonal year. The inefficiency of selection in the first clonal year was ascribed, at least in part, to the inaccuracy of yield assessment as well as the “carry-over” effect of the mother tubers. Correlations of total yield were higher between different years in the same location than between different locations. Selection under growing conditions suitable for production of seed tubers tended to result in selection of early maturing clones which would not necessarily be optimal for ware growing conditions.
    Type of Medium: Electronic Resource
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