Saturday 24 October 2020

Obscure salad vegetables: Mache and Miner's lettuce

There are a heap of common salad vegetables, many are bland or bitter.  As well as the common vegetables there are a large number of less common ones.  Two obscure salad vegetables that I particularly like are Mache corn salad, and Miner's lettuce.

Mache (Valerianella locusta) also goes by the names corn salad, lamb's lettuce, field salad, nut lettuce, and a long list of other common names.  This is a cool season crop that grows well over winter and will often self seed once the heat hits and return in your garden when the weather cools.

Mache is a small plant that is dreadfully low yielding and does not like to grow in the heat.  What is lacks in yield it makes up for in ease of growing (did I mention that it self seeds and returns each year), being highly nutritious, and a surprisingly delicious taste for a salad green.  Mache is never bitter, even when it is flowering.  While I have never seen it for sale I am told that mache commands high prices at markets and is an expensive specialty crop that is adored by chefs.

I think mache is too small, but the taste and texture of this plant are excellent so I keep growing it.  Mache is far superior to any lettuce I have eaten.  There are a few varieties around, and it crosses and sets seed readily, someone should mass cross them and select for larger, faster growing plants.

Mache corn salad - surprisingly delicious for a salad plant

Miner's lettuce (Claytonia perfoliata) is also known as Indian lettuce and according to the internet even sometimes it is called 'spring beauty'.  It is not closely related to lettuce, it is used in similar ways to lettuce which is why it shares part of the common name. 

I used to read descriptions of this vegetable on the internet that made it sound like the poor cousin to lettuce, so I didn't bother growing it for many years.  One day I got some seeds and gave it a try, and I am glad I did.  Miner's lettuce is superior to lettuce in many ways.

Much like mache, miner's lettuce is cold hardy, tastes great, and is exponentially more nutritious than lettuce.  It is never bitter, even when flowering.  It does well in full sun and does ok in part shade, meaning it grows well under taller vegetables.

This is another salad plant that will happily self seed if given the chance.  This is great as it means no seed saving, just don't allow undesirable plants to flower and the superior plants will return the following year.

Miner's lettuce looks interesting, and is simple to grow, but its appeal lies in its taste.  Much like mache, Miner's lettuce is superior to any lettuce I have eaten.  Unlike mache this can grow a little larger and provides a better yield. 

I don't think there are any named varieties, but given how readily this self seeds and the apparent genetic diversity I don't think it would be overly difficult to breed a superior variety of Miner's lettuce.

Miner's lettuce starting to flower

Miner's lettuce - young plants

If they don't have good conditions they still flower and set seed!

Miner's lettuce is never bitter

Saturday 17 October 2020

Raspberry x Strawberry Hybrid - F2 seed attempt

I wrote a few posts about attempting to create a hybrid of raspberry and strawberry through cross pollination. 

The berries themselves taste amazing and the plants are very vigorous.  Without genetic testing I can not be certain that they are hybrids or if they are just weird strawberry plants that differ from the parent species. 

Most produce lumpy red berries, some produce yellow/white berries, and one is producing pink berries which I have never seen before.  There are a lot of odd morphological differences from the strawberry parent, plus they take a lot longer to reach maturity, they are larger, more vigorous, and more productive than the strawberry parent.  While I am not yet certain if they are hybrids, I know is that they differ from the parent strawberry species in quite a lot of ways.

To be clear, this is not 'funberry' (also called "strawberry raspberry") which is not a hybrid but is a species Rubus illecebrosus that looks superficially similar to a strawberry and a raspberry.  This is not a 'strassberry', which is just a variety of strawberry.  This is not a Genetically Modified plant.  This is a true hybrid between strawberry and raspberry that I created using simple cross pollination in my yard.

If I have created a fruiting hybrid of a strawberry and a raspberry the next logical step is to attempt to grow seed and produce some F2 seedlings.  These seedlings could have any of a myriad of genetic combinations and would range from plants that contain mostly raspberry genes, to some that were half raspberry half strawberry like the parent, to some that contained mostly strawberry genes.  This is an oversimplification of what could happen, but I can't go into that here.

When the hybrid started fruiting I began collecting seeds from it.  I am unsure if they were the result of self-pollination, or raspberry pollen, or strawberry pollen, as there were many things flowering at the time and many insect pollinators around.  I did not exclude the flowers in any way as I wanted to give them the best chance of being successfully pollinated and setting viable seed. 

As no one has successfully created this hybrid and had it set fruit before there is much to be learned. More importantly, this plant if it is a true intergeneric hybrid holds a lot of breeding potential for disease resistant berries as well as amazing new tastes, but only if it either sets viable seed or if it produces viable pollen.  Given that both parents were diploid and have the same chromosome count I figured that this shouldn’t be too much of an issue.

I decided if I collected 2 or 3 seeds from each berry we would still be able to eat all the berries and I would slowly get a large number of seeds.  It was a rather productive little plant so it did not take me too long before I had a reasonable amount of seed to play with.  The seeds were not hollow, they were plump and full, they ranged in size from tiny strawberry seed size to extra-large strawberry seed size, so I collected a mixture of all the seeds.

I usually have some success germinating raspberry seeds and often 100% success with strawberry seeds.  I usually put strawberry or raspberry seeds in cold wet stratification to get them to germinate, if I leave them for too long they tend to germinate in the fridge.  I also sent some of these F2 seeds to a grower friend, hopefully they get some decent results from growing them.

I put the seeds through cold wet stratification because this method works well for both parent species.  Sunlight can trigger some seeds to germinate, and makes no noticeable difference to the germination of others, so I did both.  Some of the seeds were left in the fridge for a longer cold wet stratification while others were planted on damp soil on the window sill where I usually germinate strawberry and raspberry seeds.

I started with many hundreds of seeds.  The results were as follows:

03/03/2019 strawberry x raspberry F2 seeds put in cold wet stratification
10/06/2019 three (3) seeds germinated


No other seeds have germinated at all, only these three, which is odd.  I expected a lot more seeds to germinate considering the numbers that I stratified. 

None of the seedlings displayed any albinism.  All three looked like small strawberry plants.

None of them have produced any runners.  The strawberry line this is from produces a lot of runners in two to three months when grown from seed.  These three plants are now over a year old and none have flowered while the strawberry line produces flowers in five months when grown from seed.  At this stage the F2 plants are small, smaller than the F1 and smaller than the strawberry parent.  I am unsure if they will stay small or if they will get larger once they mature.  Given that they are well over a year old I would have expected them to reach full size by now.

From here I plan to do my best with the three that have already germinated, hopefully one of them turns into something interesting.  I also plan to save some more seed and try to germinate it, I would also like to use raspberry pollen and see if that produces viable seed.

It will be interesting if any of these F2 seedlings survive to maturity to see what their fruit is like.  At this stage they have survived winter and look much like strawberry plants only smaller.  The strawberry parent flowers around five months when grown from seed, this plant is sixteen months old and is still not flowering.  The F1 plants flower earlier in the season and more profusely than the strawberry parent, the F2 has still not flowered. 

Leaf comparison: F2 hybrid on the left, F1 hybrid on the right

While none of this actually proves anything and there is a chance that they are not hyrbids, it all lends weight to the possibility that the parent may be a true intergeneric hybrid.  If it is not a hybrid, then it is a mutant with rather frustrating timing.  I sent samples of these plants for testing, so should hopefully have some answers very soon.

Edit to add: early/05/2021 flowering - over two years from seed to maturity!!!  Given the parent strawberry flowers in about 5 months this is remarkable and indicative that it is a hybrid.

Edit to add: this was tested by the CSIRO.  The results are on this blog post

Monday 12 October 2020

Strawberry Raspberry hybrid leaves being tested soon

I have written a few posts about my attempt at creating a strawberry raspberry hybrid using cross pollination.  While the resultant plants display several morphological differences to the parent species, and are far more vigorous than the strawberry parent, the plants do look remarkably like a strawberry. 

I made every effort to ensure a hybrid was produced (emasculating flowers, bagging flowers, etc), and while this would exclude flying insects such as flies or bees this attempt was produced in the field.  As such there is a chance that some tiny ant was able to crawl under my bag and pollinate the flowers with pollen from who knows where. 

For this reason I have been trying for quite some time to have these plants tested by a lab to determine if they are hybrids or something else (perhaps they are polyploid, perhaps a mutation).  For various reasons I have not yet been able to have these plants tested, which has been rather frustrating.

Recently someone contacted me who knows someone in the CSIRO who may be able to test my plants.  I contacted the CSIRO, we had a discussion, and they are willing to test my plants.  I have sent the CSIRO sample leaves of several F1 hybrids, one F2 hybrid, and samples of both parent plants for analysis. 

If all goes well I will know before Christmas if they are hybrids.  Regardless of the outcome I will post the results on this blog.  Exciting times!

Strawberry raspberry hybrid leaf comparison
Hybrid leaves top, strawberry parent leaf lower left, raspberry parent leaves lower right

Strawberry raspberry hybrids F1 and F2
F1 hybrid leaves on right, F2 hybrid leaves on left

Hybrid leaf - long petiolules not quite opposite

strawberry X raspberry hybrid and strawberry parent
Hybrid leaf at top, parent strawberry lower

raspberry x strawberry hybrid
Hybrid - inconsistent flowers and a lot more flowers per set

Sunday 4 October 2020

Chufa varieties

Chufa (Cyperus esculentus) is an underrated crop.  Chufa tastes nice and can yield very well.  I have only ever eaten them raw but to me the little tubers taste sweet and a lot like almonds when raw. 
I have only ever eaten the 'regular' chufa, but I really like them.  The taste and the texture are very appealing to me.  If I could buy these in the shops I would eat them every day.

It is difficult to find any chufa to grow.  Some places sell unnamed varieties, others sell seeds, but over all chufa is difficult to find for some reason.

A very generous person sent me five different varieties of chufa to grow.  I soaked them prior to planting them and hope to be able to compare them after a season.

Chufa grows much like water chestnuts, but without needing to be under water.  There is even a weedy version that produces tiny tubers and numerous seeds which is a bit of a nuisance in crops and lawns.  Most of the improved named varieties do not produce seed.  Hopefully they grow well for me and produce a lot of fat little tubers at the end of the season.

This blog post is mostly for me to be able to compare things more easily later.  The postcode boxes can be used for scale, but in hind sight I should have taken pictures of each variety next to a ruler or something.  I will have to try and remember that at the end of the season.

Chufa - Ale

Chufa - Jumbo

Chufa - Black Tiger

Chufa - Spanish

Chufa - regular