Saturday 11 January 2020

Woolly leaf tomato in Australia

Years ago I used to grow a tomato with the angora leaf gene.  This gene causes extra/branched trichomes on leaves and stems giving them a fluffy feel and interesting appearance.

I grow a tomato called "Angora 82" which kind of shows this trait, but not like I remember it.  This variety was in with some very old seeds (at least 23 years old) that I grew and I don't know where I originally got it from or where it got its name.  Angora 82 is high yielding, very compact, tastes very sweet, so it is worth growing, but it is not as woolly as the plants I remember.  None of the other old seeds with the word 'angora' or 'woolly' in their title germinated at all.  Considering their age I was happy that any germinated at all.

It appears that the angora gene was gone from Australia.  Importing tomato seeds into Australia is far too difficult and expensive for home growers, so it looked unlikely to be able to grow fuzzy tomatoes like this ever again.

Then a seed company in Tasmania listed one of the newer bred tomato varieties which carries this gene.  I didn't ask how they got this variety, I was just happy that they were able to sell me some seeds.  The variety they listed is called 'Woolly Kate'.

Angora leaf tomato
Woolly leaf tomato - looks like it is covered in frost
Woolly Leaf tomato flowering - stunning white foliage
This year I am growing a few "Woolly Kate" tomatoes.  They are a high anthocyanin tomato (they produce blue or black fruit) and they carry the angora leaf gene.  There are very few blue fruited woolly leaf tomatoes so being able to grow this variety is a real treat.

The leaves are green and covered in hairs.  None of these photos do them justice, in the right light they shimmer white and look like they are covered in frost.  Sometimes in late afternoon they sparkle in ways that I can't explain in words.

There are a few different genes that can cause the woolly leaf trait in tomatoes.  One is dominant and is homozygous lethal, and one is recessive.  It is difficult to tell them apart without growing out a large number of seeds, and crossing them with a variety that does not carry this trait is very helpful in working out things.

I am happy to say that this is from the recessive gene.  This means it will be relatively easy to do some tomato breeding and insert this gene into other new varieties. 

Woolly tomato leaf shimmers in the right light
Many plants that are covered in hairs like this use it as a way to protect themselves from harsh sun or excessive heat.  Sounds useful in Australia.  In other plants the leaves help protect them from mild frosts, which would be useful in extending the growing season.

It is currently unknown if this woolly leaf trait helps tomatoes be more water efficient or grow better under hotter condition or protects from mild frosts.

I would also be interested to know if tomatoes with woolly leaves are more resistant to pests and diseases, or if they have more issues with pests and diseases.  At this stage I am not really sure.

This summer has been the hottest on record for this region, it is also driest on record for this region, and I have very little water, so it will be interesting to see how the yield of these tomatoes compares to other varieties.

Even if the woolly leaf trait does not help in any way the plants really look amazing so I will keep growing them.  The leaves also feel soft, kind of like a plant called lambs ears (Stachys byzantina).  My kids keep touching the leaves each time they walk past them, they are really fascinated with Woolly Kate tomatoes.

Woolly Kate in the foreground, various other tomato varieties in the background
This summer has been pretty dreadful in my garden (and pretty much everywhere else in Australia).  I planted late, then it has been very hot, very dry, I haven't had much water to spare, we have had several intense dust storms, and there have been many weeks of thick bush fire smoke.

At this stage I don't know if my plants will survive summer.  This summer already I have lost a lot of things that have always performed well for me.  My other surviving tomato plants are all flowering but the flowers are aborting, so far only Woolly Kate has a few unripe fruits that have not dropped off.  The tomatoes are fluffy and the plants seem to be handling the extreme conditions better than my other varieties so far.
Woolly Kate grafted to a regular leaf plant, the difference in foliage is amazing

If I get to save seed from Woolly Kate and if I have enough spare seed I will try to list them for sale through my for sale page.  If not I should have enough seed to sell in future years.  I also have plans for breeding with them to get a few other varieties with woolly foliage in Australia.


Woolly leaf tomato with unripe fruits
Blue fuzzy tomatoes still not ripe

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