Genetic Variation within and between Two Cucumber Populations Derived via the Inbred Backcross Line Method
| Autor: | K.W. Owens, F.A. Bliss, C.E. Peterson |
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| Rok vydání: | 1985 |
| Předmět: | |
| Zdroj: | Journal of the American Society for Horticultural Science. 110:437-441 |
| ISSN: | 2327-9788 0003-1062 |
| DOI: | 10.21273/jashs.110.3.437 |
| Popis: | Selected inbred backcross lines from 2 cucumber (Cucumis sativus L.) populations were studied to determine whether genetic variation existed within and between 2 populations for fruit length and weight. F1 hybrids from intra-population diallel and inter-population North Carolina Design II matings were evaluated in 1981 under greenhouse or field conditions. Significant genetic variability was found among selected inbred backcross lines within each population for fruit length and weight. General (GCA) and specific (SCA) combining ability estimates were significant, indicating that both additive and nonadditive effects were important for trait expression among lines from the same population. Analysis of inter-population design II F1 hybrids indicated that male and female (GCA) or additive effects accounted for most of the variation between lines for fruit length and weight. Significance of specific combinations (SCA) and the F2 data confirmed that genetic variation existed between populations. Therefore, selection and intercrossing of specific inbred backcross lines from both populations may lead to maximum fruit size and recovery of the desired horticultural characterisics of the recurrent parent. The inbred backcross line method is well suited for the transfer of genes controlling a quantitative trait from an unadapted or exotic source into a commercially acceptable type. |
| Databáze: | OpenAIRE |
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