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Low temperature is a major stress factor that has adverse effects on chrysanthemum production; however, there is little information regarding the genetic mechanism of cold tolerance. Based on a previously constructed F1 mapping population, genetic variations and QTL effects were investigated for cold tolerance at the vegetative, bud, flower, and rhizome stages. The results showed that the coefficient...
Aphid, Macrosiphoniella sanbourni, is a major insect pest that adversely affects ornamental quality and production of chrysanthemum, thus it is critical to develop new cultivars resistant to aphid. However, the genetic mechanism governing aphid resistance is thus far not thoroughly investigated in chrysanthemum. This study aimed to characterize the genetic variation of the aphid resistance in a global...
Waterlogging tolerance (WT) is a major objective in chrysanthemum breeding programs, and although certain genotypes with different tolerance levels have been identified, their value as parents for WT breeding is unknown. Here, twelve F1 crosses derived from an incomplete diallel mating scheme were conducted to investigate combining ability and heterosis for WT and their relationships with parental...
Branching is an important horticultural trait that influences plant architecture and production of cut chrysanthemum; however, its genetic determinism is poorly understood. In this study, an F 1 mapping population derived from a cross between two spray cut chrysanthemum cultivars was used to determine QTL underlying branching. The branching traits in the F 1 mapping...
Intergeneric hybridization is an effective way of improving crop resistance against biotic and tolerance to abiotic stresses. Here, we describe an intergeneric hybrid between Chrysanthemummorifolium ‘Nannongxiaoli’ and Artemisia vulgaris ‘Variegata’ using ovule rescue. Chromosome counting confirmed that out of the 124 regenerated plantlets, 19 were genuine hybrids, carrying the expected hybrid number...
Two progeny populations of upland cotton derived from mass selection-mass crossing, M3S2F5 and its family lines M3S2F5:6, were generated from 17 hybrid cotton lines derived from regional trials conducted in the Yellow River basin and Yangtze River basin in China. These populations were used to verify 39 reported molecular markers that were related to quantitative trait loci (QTLs) for Verticillium...
The inheritance of two flowering traits of chrysanthemum, initial blooming time and the duration of flowering, was investigated using segregation within an F1 population derived from a cross between the autumn-flowering ‘Yuhualuoying’ and the summer-flowering ‘Aoyunhanxiao’ cultivars. The analysis, based on a single segregating generation and the major gene plus polygene mixed inheritance model,...
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