Combining ability effects in the progeny of chosen strawberry cultivars (Fragaria × ananassa Duch.)
Elżbieta Kaczmarska
elzbieta.kaczmarska@up.lublin.plKatedra Genetyki i Hodowli Roślin Ogrodniczych, Uniwersytet Przyrodniczy, Lublin (Poland)
Abstract
In this study five strawberry parental forms and F1 hybrids obtained from diallel crossing performed according to Griffings method III (with the effects of reciprocal crosses without inbred) were evaluated. The progeny (20 hybrids) and parental forms were planted in the field in a completely randomized block design (4 replicates, 30 plants in each plot). The aim of the study was to assess the general (GCA) and specific (SCA) combining abilities and the effects of reciprocal crosses (RE) in five strawberry cultivars. In 2005–2006 the following features of plants were analyzed: mean yield per plant, mean number of fruits per plant, mean weight of single fruit and vigour of plants (as a mean number of leaves). The statistical analysis was assessed on the basis of mean results obtained in the first and second year of fructification. The parental forms showed positive or negative results as regards the general combining ability. The highest positive GCA effect of yield per plant was recorded in cv. Teresa. In this cultivar, however, the GCA value for the average number of fruits per plant was negative. Cultivars Chandler, Kent and Senga Sengana showed negative GCA effects for average number of leaves per plant. Disadvantageous effects of cv. Senga Sengana upon all the analyzed traits in the hybrids were recorded. Positive SCA effects for all the traits were found in the progeny Kent × Teresa and 1387 × Senga Sengana. The results of reciprocal crosses upon the yield of fruit per plant indicated that cv. Senga Sengana can give better effects when it is used as a maternal component. In contrast, the cvs. Kent and Teresa provide better effects as parental forms.
Keywords:
combining ability, diallel cross, strawberryReferences
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Authors
Elżbieta Kaczmarskaelzbieta.kaczmarska@up.lublin.pl
Katedra Genetyki i Hodowli Roślin Ogrodniczych, Uniwersytet Przyrodniczy, Lublin Poland
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Copyright (c) 2008 Elżbieta Kaczmarska
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