Inheritance of Resistance to Colletotrichum Species in Strawberry

Gupton, C. L.; Smith, Barbara J.

doi:10.21273/jashs.116.4.724

Cited by 16 publications

(19 citation statements)

References 8 publications

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“…Except for the seedling test at North Carolina, H 2 estimates in this study were lower than those previously reported in a large population to examine resistance of strawberry to C. fragariae and C. acutatum (9). The h 2 estimates from both transplant types were lower at the Florida location and higher in the seedling test in North Carolina compared with the previous study (9).…”

Section: Discussioncontrasting

confidence: 87%

“…One experiment with a small population of six parents and nine full-sib families gave as a result an estimate of additive variance four times higher than the estimate of dominance variance and a very large narrow-sense heritability (h 2 = 0.89). Another experiment with a large population of 40 parents and 87 full-sib families produced an estimate of dominance variance 10 times higher than the additive variance (9). An additional study, based on a fixed model, of a small population of six parents and 14 full-sib families reported specific combining ability (SCA) of resistance to C. acutatum larger than the estimate of general combining ability (GCA) (7).…”

mentioning

confidence: 95%

“…Previous experiments examining strawberry resistance to C. fragariae and C. acutatum used variable population sizes and gave contrasting results of estimates of additive and dominance variance (9). One experiment with a small population of six parents and nine full-sib families gave as a result an estimate of additive variance four times higher than the estimate of dominance variance and a very large narrow-sense heritability (h 2 = 0.89).…”

mentioning

confidence: 98%

“…Anthracnose crown rot is caused by either C. fragariae or C. gloeosporioides, and disease is most prevalent under warm, humid environmental conditions such as those in the southeastern United States (9,12,21). Under such environmental conditions, susceptible cultivars may become infected in either the nursery or fruiting field, which can result in reduced plant performance or plant death.…”

mentioning

confidence: 99%

“…with cultivars (4,11,12) but few reports have been published on the partitioning of the total genetic variance of resistance to diseases caused by Colletotrichum spp. (7,9). This scarcity could be related to the lack of agreement in the mode of gene action because some authors have suggested a major gene model (4,7) and others a quantitative genetic model (1,9).…”

mentioning

confidence: 99%

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Genetic Variation and Gains in Resistance of Strawberry to Colletotrichum gloeosporioides

Osorio¹,

Pattison²,

Peres³

et al. 2014

Phytopathology®

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Anthracnose crown rot is an important disease of strawberry primarily caused by Colletotrichum gloeosporioides in Florida and North Carolina. Information on the magnitude of additive and nonadditive genetic variation is required to define breeding strategies and to estimate potential genetic gains. However, little is known about the genetic control of resistance and its utility in breeding. Our objectives were to obtain estimates of heritabilities and of components of genetic variances, genotype-environment interactions, and gains for resistance, and to examine the effects of locations and transplant types on the estimates. An incomplete diallel mating design generated 42 full-sib families, which were propagated in plugs from seed (seedling tests) and as bare-root runner plants (clonal tests) of different genotypes of the same families. Both seedlings and clones were inoculated with C. gloeosporioides under field conditions in North Carolina and Florida during the 2010-11 season. Narrow-sense heritability (h(2)) and broad-sense heritability (H(2)) for both clones and seedlings were higher at the North Carolina location (h(2) = 0.34 to 0.62 and H(2) = 0.46 to 0.85) than at the Florida location (h(2) = 0.16 to 0.22 and H(2) = 0.37 to 0.46). Likewise, the seedling tests showed higher genetic control than the clonal tests at both locations. Estimates of dominance variance were approximately one-third of the additive variance at North Carolina and were even larger at Florida. Epistasis was negative at both locations and assumed zero for heritability (H(2)) calculations. Genotype-environment interactions were different by transplant type, suggesting rank changes across locations. 'Pelican' was the most resistant parent at both locations, followed by 'NCH09-68' at the NC location and 'Winter Dawn' at the Florida location. Selection and deployment of the most resistant clone within each of the five best families is estimated to produce average genetic gains of 53.0 and 73.7% at the North Carolina and Florida locations, respectively.

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Section: Discussioncontrasting

confidence: 87%

mentioning

confidence: 95%

mentioning

confidence: 98%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Genetic Variation and Gains in Resistance of Strawberry to Colletotrichum gloeosporioides

Osorio¹,

Pattison²,

Peres³

et al. 2014

Phytopathology®

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Strawberry Disease Management

Maas¹

Diseases of Fruits and Vegetables: Volume II

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Comparison of six inoculation techniques withColletotrichum acutatum on cold stored strawberry plants and screening for resistance to this fungus in French strawberry collections

Denoyes-Rothan

Guérin

1996

Eur J Plant Pathol

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Six inoculation techniques were compared for their ability to evaluate resistance to Colletotrichum acutatum of five strawberry cultivars. Inoculation by dipping the whole cold stored plants in a suspension of conidia adjusted to 2.106 conidia ml -~ made it possible to screen cultivars resistant to crown rot at 28 days after inoculation. Using the dipping technique, 44 strawberry cultivars were evaluated for their resistance to one strain of C. acutatum, 1267b. Twelve of them did not show wilt symptoms and could be classified as resistant. When another strain of C. acutatum, 494a, was inoculated to seven cultivars, all of them including Dover, resistant to 1267b, showed wilt symptoms. This result showed the importance of investigations on genotype x isolate interactions to conduct an efficient breeding programme for screening resistance to C. acutatum.

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Inheritance of Resistance to Colletotrichum Species in Strawberry

Cited by 16 publications

References 8 publications

Genetic Variation and Gains in Resistance of Strawberry to Colletotrichum gloeosporioides

Genetic Variation and Gains in Resistance of Strawberry to Colletotrichum gloeosporioides

Strawberry Disease Management

Comparison of six inoculation techniques withColletotrichum acutatum on cold stored strawberry plants and screening for resistance to this fungus in French strawberry collections

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