Dr. John R. Clark

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  www.malvern-online.com/content/view/91916/ - [Cached Version]
  Published on: 4/16/2008    Last Visited: 4/16/2008  

  University of Arkansas Professor John Clark, a fruit specialist, said growers for the most part should not be harmed, though temperatures were in the 20s in parts of north Arkansas."Generally, our most dangerous time was Sunday night and not Monday.We thought that on Sunday night, we probably had potentially some damage in the northwest part of the state on peaches and apples.I thought blueberries probably would be OK, and still do," Clark said.Peach growers don't have to worry unless virtually all their blossoms are ruined."Those that suffered some damage, if they lost half their flowers, then they still have plenty.I believe that will be what we'll have in some places, but some places probably have full crops," Clark said.Clark said some growers likely had trouble from the freeze, but the scale would not approach the widespread devastation of last year.

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  www.oregonhorticulturalsociety.org/newsletter/newslette - [Cached Version]
  Published on: 2/6/2006    Last Visited: 5/18/2007  

  John Clark; University of Arkansas

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  www.arflowerandgardenshow.org/speakerschedule2007.htm - [Cached Version]
  Published on: 1/1/2007    Last Visited: 11/21/2007  

  Dr. John Clark, Professor of Horticulture, University of Arkansas, Fayetteville
  
  "Adding Fruit Plants to Your Home Landscape"
  
  3:00 P.M.

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  deltafarmpress.com/news/fruit-varieties-0402/ - [Cached Version]
  Published on: 10/6/2008    Last Visited: 4/3/2008  

  "Just a bunch of briars, but some sophisticated ones at that," John R. Clark likes to say about the blackberry varieties developed in the breeding program he directs for the University of Arkansas System's Division of Agriculture.
  
  But these briars have pedigrees and are in demand around the globe, which has led to partnerships between the Arkansas breeding program and companies in Chile and England, with more to come.
  
  In 1997, Clark, a horticulture professor based on the university's Fayetteville campus, inherited a unique collection of blackberry germplasm and continues to improve it in a fruit breeding program that also includes grapes, peaches, nectarines and blueberries.
  ...
  Moore started patenting UA varieties with the Reliance grape in the early 1980s and Clark has continued to do so.
  ...
  Clark says he realized that, while the germplasm collection exists to benefit Arkansas fruit growers, "we couldn't keep it to ourselves if we wanted to."Protecting a plant worldwide with plant breeders' rights available in over 60 countries and strictly enforcing this protection is difficult, he says.Others can legally use patented varieties for breeding with no return to the university.
  
  "Our testing of Arkansas breeding lines and varieties in other states and countries revealed opportunities to maximize genotype by environment interactions," Clark says."Some of our germplasm that doesn't do well in the heat and humidity of our summer does great in a more moderate climate."
  
  Clark recognized that there were lines in the program - also in the grape, blueberry, peach and nectarine breeding programs - that likely would be discarded in Arkansas but might have use in other locations.
  
  So, starting about 2002, Clark began broadened testing and breeding relationships with partners in various locations such as South America, Australia and South Africa in the southern hemisphere, where the growing season occurs during Arkansas' winter, and the United Kingdom, where fresh fruit is not likely to be produced and marketed in competition with Arkansas producers.
  
  The partnerships were developed to strengthen the program on behalf of Arkansas growers by generating royalty income for research.
  
  One partner is Hortifrut, one of the world's largest fruit growing and marketing companies based in Santiago, Chile.Another is Hargreaves Plants, a nursery company in Spalding, Lincolnshire, United Kingdom.
  
  "Our partners pay for access to our material for use in the cooperative improvement programs, and if a variety is developed that is commercialized the university receives royalties," Clark says.
  
  Other partners are interested in simply growing already patented Arkansas varieties of blackberries, grapes, peaches, nectarines and blueberries.One of these is Eurafruit, which is testing Arkansas varieties on its farms in South Africa for production and shipment of fruit to Europe.Ozeki Nursery in Japan is licensed to propagate and market a variety of Arkansas blackberry plants.
  
  "Blackberries are hot, right now," Clark says, "and fortunately, for our purposes, it is mainly a fresh market crop with limited storage time compared to frozen berries."
  
  However, he adds, Arkansas growers could benefit from an expanded "market presence" over a longer period of time to strengthen consumer demand for blackberries if berries from other areas find there way into local stores.
  
  Come June, Clark says, the deal-making goes on hold while he attends to his main chore of tasting berries and evaluating plants from this year's almost 9 miles of seedlings at the Division of Agriculture's Fruit Research Station on Red Lick Mountain near Clarksville.
  ...
  Clark sees potential to license the primocane fruiting material to other breeding cooperators to help generate funding for research to combine primocane fruiting with other traits needed for Arkansas growing conditions.
  
  "Science works best when scientists share information," Clark says.Hybrid seedlings grown in Chile or England, for example, might generate a primocane fruiting plant that would be perfect for those locations or for Arkansas, he says.

• 
  www.phdeb.org/topstoriesEvents/events_detail.php?id=266 - [Cached Version]
  Published on: 10/6/2008    Last Visited: 7/31/2008  

  "Just a bunch of briars, but some sophisticated ones at that," John R. Clark likes to say about the blackberry varieties developed in the breeding program he directs for the University of Arkansas System's Division of Agriculture.
  
  But these briars have pedigrees and are in demand around the globe, which has led to partnerships between the Arkansas breeding program and companies in Chile and England, with more to come.
  
  In 1997, Clark, a horticulture professor based on the university's Fayetteville campus, inherited a unique collection of blackberry germplasm and continues to improve it in a fruit breeding program that also includes grapes, peaches, nectarines and blueberries.
  ...
  Moore started patenting UA varieties with the Reliance grape in the early 1980s and Clark has continued to do so.
  ...
  Clark says he realized that, while the germplasm collection exists to benefit Arkansas fruit growers, "we couldn't keep it to ourselves if we wanted to."Protecting a plant worldwide with plant breeders' rights available in over 60 countries and strictly enforcing this protection is difficult, he says.Others can legally use patented varieties for breeding with no return to the university.
  
  "Our testing of Arkansas breeding lines and varieties in other states and countries revealed opportunities to maximize genotype by environment interactions," Clark says."Some of our germplasm that doesn't do well in the heat and humidity of our summer does great in a more moderate climate."
  
  Clark recognized that there were lines in the program — also in the grape, blueberry, peach and nectarine breeding programs — that likely would be discarded in Arkansas but might have use in other locations.
  
  So, starting about 2002, Clark began broadened testing and breeding relationships with partners in various locations such as South America, Australia and South Africa in the southern hemisphere, where the growing season occurs during Arkansas' winter, and the United Kingdom, where fresh fruit is not likely to be produced and marketed in competition with Arkansas producers.
  
  The partnerships were developed to strengthen the program on behalf of Arkansas growers by generating royalty income for research.
  
  One partner is Hortifrut, one of the world's largest fruit growing and marketing companies based in Santiago, Chile.Another is Hargreaves Plants, a nursery company in Spalding, Lincolnshire, United Kingdom.
  
  "Our partners pay for access to our material for use in the cooperative improvement programs, and if a variety is developed that is commercialized the university receives royalties," Clark says.
  
  Other partners are interested in simply growing already patented Arkansas varieties of blackberries, grapes, peaches, nectarines and blueberries.One of these is Eurafruit, which is testing Arkansas varieties on its farms in South Africa for production and shipment of fruit to Europe.Ozeki Nursery in Japan is licensed to propagate and market a variety of Arkansas blackberry plants.
  
  "Blackberries are hot, right now," Clark says, "and fortunately, for our purposes, it is mainly a fresh market crop with limited storage time compared to frozen berries."
  
  However, he adds, Arkansas growers could benefit from an expanded "market presence" over a longer period of time to strengthen consumer demand for blackberries if berries from other areas find there way into local stores.
  
  Come June, Clark says, the deal-making goes on hold while he attends to his main chore of tasting berries and evaluating plants from this year's almost 9 miles of seedlings at the Division of Agriculture's Fruit Research Station on Red Lick Mountain near Clarksville.
  ...
  Clark sees potential to license the primocane fruiting material to other breeding cooperators to help generate funding for research to combine primocane fruiting with other traits needed for Arkansas growing conditions.
  
  "Science works best when scientists share information," Clark says.Hybrid seedlings grown in Chile or England, for example, might generate a primocane fruiting plant that would be perfect for those locations or for Arkansas, he says.

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  www.arflowerandgardenshow.com/Speaker%20Bios.htm - [Cached Version]
  Published on: 7/29/2007    Last Visited: 7/29/2007  

  Steve Dobbs | Dr. John Clark | Caroline Holmes | Robert Powell | Linda Lanier | Mark Robertson | Dr. Donald Steinkraus
  ...
  Dr. John ClarkJOHN R. CLARK is a professor of horticulture at the University of Arkansas, where he has worked in the fruit breeding program since 1980 and directed the program since 1997.His research priority is the development of varieties of blackberry, grape, peach/nectarine, and blueberry.He has released numerous fruit varieties and continues a vigorous program of hybridization at the University's Fruit Research Station at Clarksville, Arkansas.He also manages the intellectual property rights of the Arkansas varieties.He teaches fruit production and plant breeding courses at the university's Fayetteville campus.

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  www.thecabin.net/stories/041508/loc_0415080004.shtml - [Cached Version]
  Published on: 4/15/2008    Last Visited: 4/15/2008  

  University of Arkansas Professor John Clark, who specializes in fruit cultivation, said being on a hillside can make a big difference, as colder air will collect in valleys.
  
  "Give me a peach tree blooming at 25 degrees or 29 degrees, you can tell the difference," Clark said.
  
  If peach growers lose some blossoms, they could still have a good crop.Clark noted that peach growers will prune up to 95 percent of blossoms.
  
  "The positive outlook it could make you a little money, not having the thinning cost.But if the temperature is a little lower, you might not have a crop," Clark said.

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  www.pbcommercial.com/articles/2008/04/16/ap-state-ar/d9 - [Cached Version]
  Published on: 1/1/2008    Last Visited: 4/16/2008  

  University of Arkansas Professor John Clark, a fruit specialist, said growers for the most part should not be harmed, though temperatures were in the 20s in parts of north Arkansas.
  
  "Generally, our most dangerous time was Sunday night and not Monday.We thought that on Sunday night, we probably had potentially some damage in the northwest part of the state on peaches and apples.I thought blueberries probably would be OK, and still do," Clark said.
  
  Peach growers don't have to worry unless virtually all their blossoms are ruined.
  
  "Those that suffered some damage, if they lost half their flowers, then they still have plenty.I believe that will be what we'll have in some places, but some places probably have full crops," Clark said.
  
  Clark said some growers likely had trouble from the freeze, but the scale would not approach the widespread devastation of last year.

• 
  www.pbcommercial.com/articles/2008/04/15/ap-state-ar/d9 - [Cached Version]
  Published on: 1/1/2008    Last Visited: 4/15/2008  

  University of Arkansas Professor John Clark, who specializes in fruit cultivation, said being on a hillside can make a big difference, as colder air will collect in valleys.
  
  "Give me a peach tree blooming at 25 degrees or 29 degrees, you can tell the difference," Clark said.
  
  If peach growers lose some blossoms, they could still have a good crop.Clark noted that peach growers will prune up to 95 percent of blossoms.
  
  "The positive outlook it could make you a little money, not having the thinning cost.But if the temperature is a little lower, you might not have a crop," Clark said.

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  www.goodfruit.com/briefs.php?brief=466 - [Cached Version]
  Published on: 3/10/2008    Last Visited: 3/10/2008  

  James N. Moore, Justin R. Morris, and John R. Clark.
  ...
  John R. Clark Ph.D., ProfessorUniversity of Arkansas

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