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Florenceville-Bristol, Canada

Nassar A.M.K.,McGill University | Abdulnour J.,McGill University | Leclerc Y.,McCain Foods Canada Ltd | Li X.-Q.,Agriculture and Agri Food Canada | Donnelly D.J.,McGill University
American Journal of Potato Research | Year: 2011

'Russet Burbank' has limited fertility and has not parented improved cultivars through traditional breeding efforts. This study showed that 'Russet Burbank' (NB clone) could be improved through selection of intraclones (somatic embryos derived from specific tuber tissues) based on field performance and/or processing characteristics. In 2005 and 2006, approx. 800 intraclones were regenerated from field-grown tubers or microtubers. Intraclones were micropropagated, acclimatized, and field-tested to identify the highest yielding lines. Each season, following storage, tubers of selected lines were tested for glucose content and French fry-processing quality. In 2007, the best intraclones from earlier seasons were increased through micropropagation and retested for yield and processing features. Approx. 2-9% of intraclones had similar yield to controls but superior processing features. Neither tuber source nor explant tissue type affected intraclone tuber yield, type, or processing characters. We recommend the incorporation of somatic embryogenesis into potato improvement programs for processing quality traits. © 2011 Potato Association of America.


Bethke P.C.,University of Wisconsin - Madison | Nassar A.M.K.,McGill University | Kubow S.,McGill University | Leclerc Y.N.,McCain Foods Canada Ltd | And 7 more authors.
American Journal of Potato Research | Year: 2014

The importance of Russet Burbank, the world’s foremost French fry processing cultivar, requires a complete description of its origin. Its maternal lineage included Rough Purple Chili, Garnet Chili, Early Rose, and Burbank. An incorrect but widely disseminated account attributes the origin of Russet Burbank to Colorado potato grower Lou D. Sweet, with 1914 often given as the date of introduction. However, it is likely that Russet Burbank was originally released in 1902 as May’s Netted Gem by L. L. May & Co. (St. Paul MN). The names Netted Gem and Russet Burbank were used synonymously for many decades. Isoenzyme, multiplex PCR, and SNP data confirm Russet Burbank as a mutation of Burbank and do not support a seedling origin. Russet Burbank was found to be similar to Burbank in processing and nutritional characteristics. A goal of this effort is that descriptions of Russet Burbank’s lineage and origins will be corrected by seed companies in lists of potato varieties and at world repositories holding Russet Burbank and its progenitors. © 2014, The Potato Association of America.


Nassar A.M.K.,McGill University | Nassar A.M.K.,Damanhour University | Sabally K.,McGill University | Kubow S.,McGill University | And 2 more authors.
Journal of Agricultural and Food Chemistry | Year: 2012

Potato consumption provides significant dietary contributions to several essential minerals, but the effects of cultivar and planting site are not well-understood. The mineral content of 16 cultivars, grown at 5 locations, was measured using inductively coupled plasma-optical emission spectroscopy and evaluated on a per serving basis for percent recommended daily intake (% RDI), emphasizing some minerals where global deficiencies are common (calcium, iron, selenium, and zinc). Discriminant analysis showed that both genotype and growing location were important. Differences in mineral content occurred between cultivars at each site, specific cultivars at different sites, and collectively between sites. 'Freedom', 'Yukon Gold', and particularly the very stable mineral source 'Russet Burbank' contributed most to the % RDI for minerals. One serving per day of these cultivars provides a significant contribution to the % RDI for the macrominerals magnesium, phosphorus, and potassium and the trace minerals copper, iron, selenium, and zinc. © 2012 American Chemical Society.


Li X.-Q.,Agriculture and Agri Food Canada | Zhang J.,Agriculture and Agri Food Canada | Luo S.,Agriculture and Agri Food Canada | Liu G.,CAS Institute of Botany | And 3 more authors.
International Journal of Plant Biology | Year: 2011

Light-microscopic measurement of starch granule size is the preferred approach in most laboratories because it is simple, rapid and visual and because it can study both size and shape. However, potato juice consists of starch granules with very different sizes and precipitation/movement speeds, which causes differences when sampling the juice and taking the microscopic images. The previously described method is to scrape and transfer some juice from potatoes using a razor blade directly to a slide with some water for microscopic observation. In this study we used a tape-hole chamber on the microscopic slide to reduce the cover-slip-induced shifting of small and medium granules. We improved the starch measurement reproducibility by testing various juice sampling methods. The reproducibility between repeated experiments using 10 cultivars was increased from a correlation efficient r = 0.815 in the razor-blade-scraping method to r = 0.923 in a squeezing-juice method. The largest starch granule detected was 151 μm in length. Sampling methods (using a razor-blade or a garlic press) strongly influenced the granule length values measured from the same potato tuber. The results indicated that 1) The squeezing-juice approach is more reproducible, and 2) The average length of starch granules is one of the most reproducible scores but varies according to juice-sampling methods. © X.-Q. Li et al., 2011.


Zhang J.,CAS Institute of Botany | Zhang J.,University of Chinese Academy of Sciences | Zhang J.,Agriculture and Agri Food Canada | Murphy A.,Agriculture and Agri Food Canada | And 6 more authors.
Scientia Horticulturae | Year: 2011

Heritage potato varieties in Canada are historic old varieties collected from Canada and various countries before the formal establishment of the Canadian plant variety registration system and may be a valuable gene resource for beneficial traits in potato breeding and bioproducts development. Greater evaluation is the key for the enhanced use of these materials. It is unknown how much variation of starch granules occurs among Canadian heritage potato varieties. We analyzed the starch granule size of 14 potato heritage varieties held in the Canadian Plant Gene Resources collection over 2 years using a squeezed juice and microscopic method recently developed at the Potato Research Centre. The varieties demonstrated considerable variation in starch granule size and shape. The granules showed average lengths ranging from 18 μm in the variety Congo to 32 μm in 'Russet Burbank'. The largest single granule measured from 64 μm in 'Congo' to 91 μm in 'Crotte d'Ours.' The granule sizes of the varieties showed a very high correlation (r= 0.975, P< 0.0001) between years. This high reproducibility suggests the existence of genetic factors in determining starch granule size. We also found that the starch granule size is positively correlated with tuber dry matter (in terms of specific gravity) in these heritage potatoes. The results demonstrated reproducible genotypic variation for starch granule size and shape in tubers with a significant correlation to tuber dry matter in these heritage potato varieties, and offers the possibility for and agronomic relevance of genetic modification of starch granules through selective breeding. © 2011 Elsevier B.V.

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