Potato: Color Genetics

A Summary of Potato Color Genetics Introduction Genes Controlling Color Pigments   Purple and Red   Yellow and Orange Color Distribution   Flower Color   Foliage Color Russeting Known Genotypes Introduction For many crops, you don’t have to search very far to find a nice summary chart of the major genes involved in economically important […]

Potato: A Summary of Wild Species and Their Qualities

This page is out of date, although I still find it useful for looking up synonyms and abbreviations.  For more detailed information about wild potato species, see our wild potato guide. This is one of those posts that is as much for my reference as anyone else’s.  Surprisingly, it is hard to find a simple […]

Potato: A Ploidy Primer

A micrograph showing two potato guard cells comprising a stomatum. The chloroplasts in each guard cell are marked. Six are present in one and seven in the other.

Introduction   How Seeds are Formed   Domesticated and Wild Potatoes   Ploidy   Monoploid and Haploid Numbers   Haploids Interactions of Ploidy in Crosses   Unreduced (2n) Gametes   Endosperm Ratio   Endosperm Balance Number   A Final Note on Probability Determining Ploidy   Morphological Evalutation   Guard Cell Counts   Chromosome Counts More […]

About My Potato Breeding Projects

Because we sell excess seed from my potato breeding projects, we get a lot of questions about what my goals are.  Those goals are sometimes hard to articulate because I haven’t thought through them as clearly as I have done for the other plants that I work with.  My work with potatoes goes back before […]

Summer heat and Andean crops

This was a pretty normal year on the coast of Washington.  We had a cool winter, a cool spring, a cool summer, and so far, we’re having a cool fall.  We’re close enough to the ocean that the temperature of the Pacific just off shore is a much better predictor of our temperatures than anything […]

Potatoes: First 2013 potatoes from seed

I have been swapping potato seed with other growers for a while now and there is always a hunger for pictures and information about the seeds that I offer.  I’m trying to get a little better at documenting the new varieties as they come out of the ground.  Maybe this blog will help me to […]

Potato: Extracting true potato seed (TPS)

Potato seeds (TPS) in a fine strainer for cleaning

Introduction This is the procedure that we use to extract potato seeds.  This procedure is suitable for extracting large amounts of seed while maximizing germination and minimizing potential for disease transmission.  We extract seed from as much as 25 gallons of berries in a given year and need a process that is fast and efficient […]

Potatoes: Potato flowers (Part 2)

The stats for my first post of potato flower pictures showed a lot of people doing web searches for potato flowers.  So, by indirect but popular demand, I bring you part two.  There are also some general updates about our potato season toward the bottom. Black Irish potato flowers Azul Toro potato flowers Maris Piper […]

Potatoes: Potato flowers

One thing that you miss when buying your potatoes at the store is the wonderful display that they put on when they flower.  Flowering is good news for the traditional potato grower, as it signals the beginning of tuberization.  It is also good news for those who want to grow from seed, since the plant […]