Combining ability for seed yield traits of Chenopodium quinoa breeding lines |
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Authors: | HD Mastebroek EN van Loo O Dolstra |
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Institution: | (1) Plant Research International, P.O. Box 16, 6700 AA Wageningen, The Netherlands |
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Abstract: | For a better understanding of the inheritance of seed yield traits in Quinoa (Chenopodium quinoa) Willd., a half-diallelic crossing experiment with six diverse but uniform breeding lines was conducted. True hybrid plants
were detected by means of differences in panicle colour in 14 out of the 15 crosses performed. The agronomic performance of
14 F2 populations and six parental lines was evaluated in field trials on fertile clay soil. General and specific combining ability
of the lines (GCA and SCA) were estimated. Highly significant differences in GCA effects were found between the lines for
plant height at maturity, early flowering, early maturity, seed yield and thousand seed weight. Significant SCA effects were
only found for plant height at maturity. However, SCA effects were rather small and accounted for 7% of the total variance.
The finding of large GCA effects and low SCA effects suggests that best selection results could be expected from crosses between
the agronomic best performing genotypes.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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Keywords: | Chenopodium quinoa combining ability half diallel |
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