Yeah I totally agree with what you’re pointing out. And I think this is particularly true when pushing the natural range of a given species or population. If for example you have some stable varieties you want to mix to landrace, the conditions could easily completely eliminate entire varieties at least in terms of female lines, but potentially also male lines, if they flower too late to pollinate the females which will survive to give seeds.
Also I feel that if space is limited, if one variety only crosses with a few other flowers on other plants, the chance of even using that are massively restricted since you may end up with tens of thousands of seeds overall but only have space to plant a dozen or a few dozen, so, many crosses will be missed.
So for me, logic tells me there’s a much faster method, that can also result in far higher genetic diversity, and that is, to grow very carefully and hand pollinate for the first cycle, label the seeds, be sure to plant out each cross for the second cycle, grow them carefully too, and if you can, make all possible crosses. Even if you don’t do the second round of crosses, you will at the end of that second cycle a wealth of F2 seeds of maximum diversity which you could then landrace in whatever conditions you want - they are ready for selection now. Even better if you do that second round of crossing, but either way, the 3rd cycle you can plant out and neglect as much as you want.
I sense that this method could shortcut the overall process by … maybe several/many years?
And I say ‘cycle’ instead of ‘year’ because if you want, you can get 2, 3, 4, even 5 cycles per year, potentially. For example I started my tomato project earlier this year, growing indoors, many of them using Kratky hydroponic method and using LED lights. Some in beer cans, to force them to grow and fruit very quickly. By now I have harvested the seeds of … must be more than 50 unique crosses so far. I have been a bit lax at growing the crosses out, since I now have many outdoor plant to tend to and cross also. But I am growing some of them, inter-species crosses, and am now seeing the first flowers forming. I could have been growing quicker but I crammed in more plants than optimal in my lighting area. But it looks like I’ll be getting 3 cycles per year for some of my plants anyway. Though my primary focus really, is getting enough F2 seeds (including double crosses) in this first year, to plant outside and neglect to a fair degree, next year.
The number of crosses I’ve made make it impossible to grow them all out due to space limitations, but it has also been my aim to gain familiarity with the different varieties and species, and to build a hybrid library that I can access in future, depending on future needs. It seemed it was worth the effort to work intensively at the beginning, so if I need something specific, I can just grab it, rather than have to wait a year to make it!
And, one could think ah well I could just landrace all my crosses. But, tomatoes not outcrossing much, that won’t really work for the ones without increased outcrossing traits. So, a lot of my focus has been on making crosses that help that, and that has meant doing manual crosses that would almost never occur if I just planted them out together and saved seed. That’s what I mean about saving many years. Some crosses take so much effort to make they’re usually classified as ‘impossible’ even by hand pollination, let alone by natural crossing in a garden.
So basically, my aim is low input neglectable plants, while my method is high input with a high level of care. Until I make the hybrid swarms suited to my needs to start up the joyful and hopefully well earned activity of neglect.
Hmm, just to give another example - I had a rice project which was derailed by the double blow of my illness and my plants getting a predator I had no experience with. But it was a rice breeding project. Actually I planted all that outdoors now so it’s still an ongoing project but I rate it at a lower probability of success due to outdoor climate here. But anyway, basically there are especially 2 varieties I want to cross, then landrace the F2. One is later but has the eating traits I want - black and sticky. The other has the climate traits I want, while being delicious but neither sticky nor black. Simply growing them outside together would have 2 problems:
- They would almost certainly not cross even if they flowered at the same time. That already eliminates it as a project.
- The are extraordinarily unlikely to flower at the same time anyway.
- The black sticky one is fairly likely to not give any viable seeds in this climate, which is the very reason I want to cross it.
Growing them indoors, including planting several at different times, should solve those problems. And now that I am overwhelmed with tomatoes and peppers, that is on pause, but, if they do flower outdoors, I will do my best to harvest and preserve pollen from the earlier variety, and later pollinate the black sticky one, and, if it looks like there won’t be enough time for that to give seed, I will try my best to dig some up and finish it off indoors. And who knows, I might fail. But at least my education in rice growing will be much improved, and I can try again later - maybe even later this year indoors again if I wish.
And then same story, take care until F2, get as much F2 as I can, then landrace it. Preferably in multiple locations with somewhat similar climate but just to spread my bets in case one area has something unfortunate happen that destroys the whole crop.
Even with my tomatoes outside, I am taking extra care. I mean, well, while some of my neighbours have been watering theirs every day, even in the hottest driest spells here, I watered them maybe like once every 2 weeks. But I felt like that counted as pampering I’m just trying to make sure I can harvest the crossed fruits. But am looking forward to, at least for some plots, completely abandoning watering with the F2s except for on the day I plant them.
I know what I’m doing is in some respects very different to what’s taught on the landrace course. But at least for me, this seems very logical as a landrace method. The initial hybrid swarm seems so essential to this approach, and this seems to me to be the most speedy and efficient way to create a hybrid swarm of greatest diversity. Though I totally respect the slower, lower input approach to this.