Performance of Virus Resistant Transgenic Yellow Summer Squash in Alabama

Sikora, Edward J.; Murphy, John F.; Burkett, Jason Enoch

doi:10.1300/j484v12n02_07

Cited by 8 publications

(8 citation statements)

References 3 publications

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“…Aphid and whitefly populations can be reduced through the use of insecticides combined with cultural practices, such as border crops and reflective mulches. Use of virus-resistant cultivars has been shown to be a highly effective way to combat virus disease of cucurbits (14).…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Occurrence Of Viruses Infecting Watermelon, Other Cucurbits, and Weeds in the Parts of Southern United States

Ali

Abdalla

Bruton³

et al. 2012

Plant Health Progress

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Field surveys were conducted to determine the distribution and frequency of viruses infecting watermelon and other cucurbits in the southern US in 2010 and 2011. Leaf samples were collected from 715 symptomatic plants from 10 states and were tested by dot-immunobinding assays or reverse transcriptionpolymerase chain reaction for 17 viruses that included Alfalfa mosaic virus (AMV), Bean pod mottle virus (BPMV), Cucurbit aphid born yellows virus (CABYV), Cucurbit yellow stunting disorder virus (CYSDV), Cucumber green mottle mosaic virus (CGMMV), Cucumber mosaic virus (CMV), Melon necrotic spot virus (MNSV), Papaya ringspot virus-W (PRSV-W), Squash leaf curl virus (SLCuV), Soybean mosaic virus (SMV), Squash mosaic virus (SqMV), Squash vein yellowing virus (SqVYV), Tobacco ringspot virus (TRSV), Watermelon mosaic virus (WMV), Watermelon silver mottle virus (WSMoV), Zucchini yellow mosaic virus (ZYMV), and Zucchini green mottle mosaic virus (ZGMMV). Thirteen out of 17 viruses were detected in this study. The distribution of detected viruses varied with the highest average frequency for WMV (30.6%), followed by PRSV-W (24.7%), ZYMV (13.9%), TRSV (5.7%), SqMV (3.5%), and MNSV (2.6%). The percent frequency of the remaining viruses was less than 2%. Seven viruses (AMV, BPMV, CMV, SqMV, TRSV, PRSV-W, and ZYMV) were also detected either from nearby agricultural crops or weeds species. Mixed infections were also recorded for some viruses with potyviruses being the most common. There is limited information on frequency and distribution of viruses that occur on watermelon and other cucurbits. These results indicate that potyviruses, particularly PRSV-W, WMV, and ZYMV, are frequently present in infected watermelon and other cucurbits in the southern US. Accepted for publication 30 July 2012. Published 24 August 2012.

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Section: Conclusion and Recommendationsmentioning

confidence: 99%

Occurrence Of Viruses Infecting Watermelon, Other Cucurbits, and Weeds in the Parts of Southern United States

Ali

Abdalla

Bruton³

et al. 2012

Plant Health Progress

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“…The development of PR plants that target multidisease pathosystems by methods such as marker assisted breeding (e.g., bean cultivars resistant to anthracnose, angular leaf spot, and rust [Ragagnin et al 2009 Silora et al 2006]), or RNA silencing (e.g., Nicotiana benthamiana resistance to four tospovirus species [Bucher et al 2006]), pose an additional challenge to ecologists engaged in risk assessment. While it is known that multi-species pathosystem complexes are common in nature (Raybould et al 2002, Xu et al 2008, and that spatial and temporal variation in disease incidence across species can be large (Garcı´a-Arenal et al 2001), the interactive effects of different diseases in wild host-plant populations have rarely been quantified.…”

Section: Introductionmentioning

confidence: 99%

Co‐infection patterns and geographic distribution of a complex pathosystem targeted by pathogen‐resistant plants

Biddle¹,

Linde

Godfree³

2012

Ecological Applications

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Increasingly, pathogen-resistant (PR) plants are being developed to reduce the agricultural impacts of disease. However PR plants also have the potential to result in increased invasiveness of nontarget host populations and so pose a potential threat to nontarget ecosystems. In this paper we use a new framework to investigate geographical variation in the potential risk associated with unintended release of genetically modified alfalfa mosaic virus (AMV)-resistant Trifolium repens (white clover) into nontarget host populations containing AMV, clover yellow vein virus (ClYVV), and white clover mosaic virus (WCIMV) in southeastern Australia. Surveys of 213 sites in 37 habitat types over a 300 000-km2 study region showed that T. repens is a significant weed of many high-conservation-value habitats in southeastern Australia and that AMV, ClYVV, and WClMV occur in 15-97% of nontarget host populations. However, T. repens abundance varied with site disturbance, habitat conservation value, and proximity to cropping, and all viral pathogens had distinct geographic distributions and infection patterns. Virus species frequently co-infected host plants and displayed nonindependent distributions within host populations, although co-infection patterns varied across the study region. Our results clearly illustrate the complexity of conducting environmental risk assessments that involve geographically widespread, invasive pasture species and demonstrate the general need for targeted, habitat- and pathosystem-specific studies prior to the process of tiered risk assessment.

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“…• April 2017 27(2) (Schultheis and Walters, 1998;Sikora et al, 2008). With the exception of 'Precious II' and to a lesser extent 'Enterprise', the decrease in yield in the fall compared with spring was not closely associated with virus infection.…”

Section: Resultsmentioning

confidence: 99%

“…Several published cultivar trials of summer squash have focused on the impact of virus resistance on yield (Rowell et al, 2002;Satanek et al, 2003;Schultheis and Walters, 1998;Sikora et al, 2008). However, while yields were related to level of virus resistance in some of those studies (Sikora et al, 2008); virus pressure was sufficiently low in others such that resistance levels were not well correlated with yield (Rowell et al, 2002;Satanek et al, 2003). In the present trial, cotton aphid populations were typical for the fall; however, virus pressure was fairly low.…”

Section: Resultsmentioning

confidence: 99%

“…These transgenic cultivars have a high level of resistance to viruses, while conventionally bred types typically contain an intermediate level of resistance or tolerance to virus infection (Tricoli et al, 1995). Results from field trials in Alabama have indicated that when virus pressure is high, transgenic virusresistant yellow squash cultivars can produce yields that are up to fourtimes greater than nonresistant counterparts during the fall production season (Sikora et al, 2008). Due to market resistance to transgenic crops, seed companies continue to introduce traditionally bred cultivars with improved levels of virus resistance.…”

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Yellow Squash and Zucchini Cultivar Evaluation in Georgia

Coolong

2017

hortte

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Ten yellow squash (Cucurbita pepo) and nine zucchini (C. pepo) cultivars were evaluated in southwest Georgia during spring and fall growing seasons in 2014 and 2015. Plants were grown using plastic mulch and drip irrigation following standard production practices for squash in Georgia. Plants were harvested 10 to 13 times during each study season. Fruit were graded into fancy, medium, and culls. Virus pressure was low during the trials. For yellow squash yields, there were significant cultivar by season interactions; however, Solstice, a straightneck yellow squash, and Gentry, a crookneck cultivar, were consistently among the highest yielding yellow types. Despite having no documented virus resistance, ‘Gentry’ performed well during the fall season. However, ‘Precious II’, a yellow straightneck cultivar with the presence of the precocious yellow gene, experienced high cull rates in the fall due to virus effects on the fruit. There was a year by season by cultivar interaction for zucchini yield. Despite this interaction, ‘Respect’ was ranked among the highest yielding cultivars in all four seasons of the trial. Differences were also observed between seasons for yellow and zucchini squash, with fall yields generally being lower than those in the spring. The results of this study suggest significant differences in the adaptability of squash cultivars for spring and fall production in Georgia. In addition, virus resistance, while important, should not be the exclusive factor for determining cultivars for fall-planted squash in Georgia.

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Performance of Virus Resistant Transgenic Yellow Summer Squash in Alabama

Cited by 8 publications

References 3 publications

Occurrence Of Viruses Infecting Watermelon, Other Cucurbits, and Weeds in the Parts of Southern United States

Occurrence Of Viruses Infecting Watermelon, Other Cucurbits, and Weeds in the Parts of Southern United States

Co‐infection patterns and geographic distribution of a complex pathosystem targeted by pathogen‐resistant plants

Yellow Squash and Zucchini Cultivar Evaluation in Georgia

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