Effect of Zinnia angustifolia HBK genotype on morphology and flowering of Z. angustifolia × Z. elegans Jacq. hybrids

Boyle, T. H.; Stimart, Dennis P.

doi:10.1007/bf00022602

Cited by 3 publications

(1 citation statement)

References 14 publications

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“…Although phenotypic variation within cultivars is limited, considerable genetic variation would be expected to occur within cultivars due to allogamy. Previous studies (Boyle et al, 1987;Boyle and Stimart, 1989a) have shown that Z. angustifolia cultivars also segregate for genes affecting seedling emergence, plant morphology, and flowering.…”

Section: Methodsmentioning

confidence: 99%

Responses of Zinnia angustifolia × Z. violacea Backcross Hybrids to Three Pathogens

Boyle¹,

Wick²

1996

HortSci

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True-breeding lines of Zinnia marylandica Spooner, Stimart & Boyle [allotetraploids of Z. angustifolia H.B.K. and Z. violacea Cav. (2n = 4x = 46)] were backcrossed with autotetraploid Z. angustifolia (2n = 4x = 44) and Z. violacea (2n = 4x = 48). Seed-generated, backcross (BC1) families were screened for resistance to alternaria blight (Alternaria zinniae Pape), bacterial leaf and flower spot [Xanthomonas campestris pv. zinniae (Hopkins and Dowson) Dye], and powdery mildew (Erysiphe cichoracearum DC. ex Merat). All BC1 families exhibited high levels of resistance to alternaria blight and powdery mildew. BC1 families derived from crossing Z. marylandica with autotetraploid Z. angustifolia were highly resistant to bacterial leaf and flower spot, whereas BC1 families derived from crossing Z. marylandica with autotetraploid Z. violacea were susceptible to this disease. Our results suggest that one Z. angustifolia genome in BC1 allotetraploids is sufficient to confer resistance to A. zinniae and E. cichoracearum, but at least two Z. angustifolia genomes are required in BC1 allotetraploids to provide resistance to X. campestris pv. zinniae.

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Section: Methodsmentioning

confidence: 99%

Responses of Zinnia angustifolia × Z. violacea Backcross Hybrids to Three Pathogens

Boyle¹,

Wick²

1996

HortSci

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Analysis of combining ability of two-types of male sterile and four restorer lines of Zinnia elegans

et al. 2010

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Eight cross combinations of Zinnia elegans were made using two recessive nuclear male sterile lines crossed with four restorers using the North Carolina Design II statistical method. Heterosis, combining ability and heritability was analysed using 12 horticultural traits and these demonstrated the advantage of heterosis in hybrid breeding of Zinnia elegans. Heterosis served to increase the number of whorls of ray florets across capitulum and the number of branches, and also decreased plant height, crown size, pedicel length and length of node. Thus, six horticultural traits were improved over mid parent and best parent status to fulfill major breeding goals of this herbaceous flower. The traits of plant height, number of whorls of ray florets across capitulum and pedicel length were primarily controlled by paternal additive effects, whereas crown size was mainly controlled by non-additive effects. Number of branches and length of node were affected both by paternal additive effects and non-additive effects. The ratio of general combining ability to specific combining ability indicated the importance of additive genes in the expression of these traits. Among the parental lines, AH003A and restorer A3 were chosen as primary female and male combiners, respectively. AH001A and restorer S5 were chosen as secondary combiners. The cross AH003A 9 A3 was determined as the most promising combination for producing potted plant characteristics, and AH001A 9 S5 was the best hybrid obtained in this study for cut flower traits. The analysis of combining ability for the parental lines showed that there was no causal relationship between general combining ability and specific combining ability effects.

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Combining ability among male sterile two-type and restorer lines of Zinnia elegans and implications for the breeding of this ornamental species

Lou

et al. 2011

Scientia Horticulturae

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Effect of Zinnia angustifolia HBK genotype on morphology and flowering of Z. angustifolia × Z. elegans Jacq. hybrids

Cited by 3 publications

References 14 publications

Responses of Zinnia angustifolia × Z. violacea Backcross Hybrids to Three Pathogens

Responses of Zinnia angustifolia × Z. violacea Backcross Hybrids to Three Pathogens

Analysis of combining ability of two-types of male sterile and four restorer lines of Zinnia elegans

Combining ability among male sterile two-type and restorer lines of Zinnia elegans and implications for the breeding of this ornamental species

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