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- W2031540897 abstract "To determine the level of gametoclonal variation among doubled-haploid lines (DHLs) of Triticum aestivum L. developed using anther culture techniques and its effect on agronomic performance, 70 anther culture-derived DHLs of ‘Kitt’ were compared for 7 agronomic traits to 50 single-seed descent-derived lines (SSDLs) of ‘Kitt’ and to the cultivar ‘Kitt’. In a second experiment, 26 DHLs of ‘Chris’ were compared for 7 agronomic traits to 29 SSDLs of ‘Chris’ and to the cultivar ‘Chris’. Each experiment was grown as a randomized complete block design with three replications in three environments. For ‘Kitt’, the DHLs averaged significantly lower grain yields than the comparable SSDLs. For ‘Chris’, the DHLs averaged lower, but not significantly lower, grain yield than the SSDLs. In both ‘Kitt’ and ‘Chris’, the genetic component of variance for yield of the DHLs was significantly larger than that of the SSDLs indicating the presence of gametoclonal variation. The lower average grain yield of the DHLs was explained by a larger group of low-yielding DHLs than was present in the SSDLs. Six ‘Kitt’ DHLs and 3 ‘Chris’ DHLs were lower yielding than the lowest yielding SSDL, respectively. Elite DHLs and SSDLs were similar for mean grain yield performance. Though the DHLs and SSDLs were significantly different for some yield components, the affected yield component changed with the cultivar and there was no consistent effect. Significant genotype × environment interactions were detected for some traits which were caused by changes in the magnitude of differences, rather than reversals in ranking, indicating that low yielding DHLs could be culled on the basis of visual selection or single-environment testing. Hence, gametoclonal variation was induced by the anther culture techniques used in this study, tended to be deleterious for grain yield, and was sensitive to the growing environment. However, as the DHLs and SSDLs had similar expected population means based upon expected gains from selection, this gametoclonal variation should not be a major hindrance to wheat breeding." @default.
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- W2031540897 date "1989-09-01" @default.
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- W2031540897 title "Agronomic Performance of Wheat Doubled-Haploid Lines Derived from Cultivars by Anther Culture" @default.
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- W2031540897 doi "https://doi.org/10.1111/j.1439-0523.1989.tb00357.x" @default.
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