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lenape potato wikipedia jump to content main menu main menu move to sidebar hide navigation main page contents current events random article about wikipedia contact us contribute help learn to edit community portal recent changes upload file special pages search search appearance donate create account log in personal tools donate create account log in contents move to sidebar hide top 1 glycoalkaloid content toggle glycoalkaloid content subsection 1 1 unintended risks 2 use in breeding 3 references toggle the table of contents lenape potato 3 languages français српски srpski українська edit links article talk english read edit view history tools tools move to sidebar hide actions read edit view history general what links here related changes upload file permanent link page information cite this page get shortened url switch to legacy parser print export download as pdf printable version in other projects wikidata item appearance move to sidebar hide from wikipedia the free encyclopedia potato cultivar potato lenape genus solanum species solanum tuberosum cultivar lenape breeder wilford mills of pennsylvania state university origin usa lenape b5141 6 is a potato cultivar first released in 1967 and named after the lenape native american tribe 1 which had to be pulled from the market in 1970 after findings of its high glycoalkaloid content it was bred by wilford mills of pennsylvania state university in collaboration with the wise potato chip company 2 the lenape potato was produced by crossing delta gold with a wild peruvian potato solanum chacoense known for its resistance to insects 1 3 it was selected for its high specific gravity percentage dry matter and low sugar content which made it ideal for producing potato chips 1 but it was also immune to potato virus a and resistant to common strains of late blight 4 it is of medium late maturity and produces round white tubers with shallow eyes 1 glycoalkaloid content edit after the lenape variety was released for commercial production a potato breeder in ontario ate some to see if they might be suitable as new potatoes but soon felt nauseated when the same occurred next time he ate them he sent a sample to be analysed by a vegetable biochemist dr ambrose zitnak of the university of guelph who found they contained exceptionally high levels of glycoalkaloids mainly solanine and chaconine the natural toxins found in potatoes that help protect them from pests and disease 5 lenape potatoes collected from around canada were found to contain over 16 35 mg of glycoalkaloids per 100 g of fresh potato compared to 3 18 mg in other varieties 4 samples grown at 39 locations around the us had an average of 29 mg per 100 g of potato but ranged from 16 65 mg compared to an average of 8 mg for five other varieties 6 previously high levels of glycoalkaloids in potatoes were associated with damage during harvest or potatoes that turned green due to exposure to light rather than being genetically determined 4 the variety was removed from the market in 1970 and scientists recommended that future new potato varieties be tested for their glycoalkaloid content before widespread distribution 4 7 unintended risks edit the variety has been cited as an example of how conventional plant breeding can produce varieties with high levels of toxins and this has been compared with the relatively lower risk of potential unintended health effects from genetically engineered crops gm crops 2 8 in 1992 the los angeles times reported that critics of gm crops cited it as an example of the problems they expected gm crops to create despite the lenape being a conventionally bred variety and not gm while advocates noted that lessons learned from lenape meant that regulations were in place to prevent a recurrence 7 in the case of the lenape potato the exceptionally high glycoalkaloid levels were likely due to the unintended introduction through cross breeding of new glycoalkaloid genes from the wild peruvian parent 9 genetic engineering avoids the risk of unintended introduction of new genes as only selected genes that have been characterized in detail are introduced 10 use in breeding edit lenape was kept for use in breeding and breeders selected for progeny containing high dry matter but rejected those with high glycoalkaloids 11 lenape is a parent of chipping varieties including atlantic trent belchip and snowden and a grandparent of several others 12 a study published in 1998 found that lenape had the highest dry matter content of chipping varieties released in the usa and concluded that the release of lenape marked a major advance in chipping quality and was particularly responsible for a trend of increased dry matter content in newer varieties 12 references edit 1 2 3 4 akeley r v mills w r cunningham c e watts james 1968 lenape a new potato variety high in solids and chipping quality american potato journal 45 4 142 145 doi 10 1007 bf02863068 s2cid 30347374 1 2 koerth baker marggie 2013 03 25 the case of the poison potato boingboing net retrieved 2015 11 08 friedman mendel mcdonald gary m filadelfi keszi mary ann 1997 potato glycoalkaloids chemistry analysis safety and plant physiology critical reviews in plant sciences 16 1 55 132 bibcode 1997crvps 16 55f doi 10 1080 07352689709701946 1 2 3 4 zitnak a johnston g r july 1970 glycoalkaloid content of b5141 6 potatoes american potato journal 47 7 256 260 doi 10 1007 bf02863068 s2cid 30347374 brown nancy marie fedoroff nina v 30 september 2004 mendel in the kitchen a scientist s view of genetically modified food joseph henry press pp 143 isbn 978 0 309 13368 5 sinden s l webb raymon ellis 1974 effect of environment on glycoalkaloid content of six potato varieties at 39 locations agricultural research service u s department of agriculture pp 1 30 1 2 puzo daniel 1992 06 04 the biotech debate los angeles times retrieved 2015 11 08 doyle jack 1 january 1988 biotechnology and the food supply proceedings of a symposium national academies pp 56 57 isbn 9780309074537 fedoroff nina v brown nancy marie 2004 09 30 mendel in the kitchen a scientist s view of genetically modified foods joseph henry press isbn 9780309133685 health national research council us committee on identifying and assessing unintended effects of genetically engineered foods on human 2004 01 01 unintended effects from breeding national academies press us committee on identifying and assessing unintended effects of genetically engineered foods on human health 8 july 2004 safety of genetically engineered foods approaches to assessing unintended health effects national academies press pp 42 43 isbn 978 0 309 16615 7 1 2 love stephen l pavek joseph j thompson johns asunta bohl william 1998 breeding progress for potato chip quality in north american cultivars american potato journal 75 1 27 36 doi 10 1007 bf02883514 s2cid 20654504 v t e potato cultivars list of potato cultivars adirondack blue adirondack red agata almond alturas amandine amflora anya atlantic austrian crescent bamberg belle de fontenay bintje black champion bloomer british queen butte champion désirée gala golden wonder home guard international kidney irish lumper irish white kennebec kerr s pink king edward kipfler laura lenape marcy marfona maris piper megachip melody mizen pike pink fir apple rainier russet ranger russet ratte red gold red la soda red norland red pontiac rooster russet burbank russian blue shetland black skerry champion stobrawa superior ulster emblem umatilla russet villetta rose vitelotte vivaldi yellow finn yukon gold potato cultivars fingerling potato russet potato retrieved from https en wikipedia org w index php title lenape_potato oldid 1353032446 category potato cultivars hidden categories articles with short description short description matches wikidata articles with species microformats this page was last edited on 7 may 2026 at 19 19 utc page was rendered with parsoid text is available under the creative commons attribution 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