Monday, February 13, 2017

Correction

In this space, I recently published some misinformation about some research into the breeding ancestry of the Honeycrisp apple.

I regret the error. Here is the real story.

The finding was presented at the January 5 meeting of the Minnesota Apple Grower's Association.

At the meeting, Jim Luby, of the Department of Horticulture Science at the University of Minnesota, explained that Duchess of Oldenberg and Golden Delicious are grandparents of the famous Honeycrisp apple, based on recent genetic analysis.


Honeycrisp's bloodlines have long been a bit of a mystery.

Honeycrisp's original plant patent (1975) describes the apple as "a seedling of known parentage....produced from the cross number AE 603, Macoun x Honeygold."

But in 2005, a genetic analysis concluded that the popular apple's parents were Keepsake and an unknown variety, likely a test apple that had been discarded as unsuitable. The same work ruled out both Macoun and Honeygold.

Luby, according to a grower who was present on January 5, identified Duchess and Golden D as the parents of the unknown test apple. So the ancestry for Honeycrisp can be expressed as follows:

Keepsake x (Duchess of Oldenberg x Golden Delicious)

Keepsake is a Frostbite x Northern Spy cross, according to Luby, though many other authorities give Malinda in place of Keepsake.

Luby is a Honeycrisp authority: his name is on the 1975 plant patent (with David Bedford) and also on the 2005 paper, (with Bedford and also Paul McCabe, Andrew Baumgarten, and Kyle Onan).

The authors of the paper note, "Despite anecdotal evidence, and even breeding records, the origin of many important plant cultivars remains unknown or uncertain."

Slowly but surely, DNA analysis is filling in those blanks.


5 comments:

  1. You ever review the Keepsake?
    Very Honeycrisp like.

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    Replies
    1. Reputedly a super keeper that matures in January and keeps through April.

      I have never had the pleasure alas,

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    2. I also wonder why Frostbite, which has been used in Minnesota breeding for some time is not more known. I have Frostbite scionwood on its way and am anxious to grow some. Limited reports point towards a rich and sweet apple.

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    3. @Paul, my theory is that it is difficult for these regional varieties to take hold because of the structure of the marketplace, which rewards the status quo.

      To break into the wholesale markets you need a big marketing battering ram, and to do that you need a revenue stream. And, to have that stream you probably need a current patent that give you exclusive rights to the fruit.

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