I was reading an article in an issue of a journal linked from the Agricultural Biodiversity Weblog, about using crop wild relatives in potato breeding, and it mentioned a technique called mentor pollination. The basic idea is that you make a difficult interspecific cross and then, a couple days later, pollinate the same flower with pollen from the seed parent species, but with some obvious genetic marker like flower color. The pollen tubes from the first pollination have a head start, but some seeds develop from the second pollination. The seeds from the second pollination keep the fruit from aborting, giving those from the interspecific cross more time to develop.
It sounds like a pretty cool and simple technique.
Post by keen101 (Biolumo / Andrew B.) on Jul 6, 2017 13:06:18 GMT -5
Yeah I've read something similar. Sounds like a good technique. Not sure if i read them with potatoes though, perhaps muy wild tomato breeding papers I've been reading. I feel like it could work with squash well. With some of the one way tomato crosses one paper said if they pollinated it 12 times and it failed to set a fruit they considered it a failed attempt. But that was without mentor pollen im pretty sure. But i feel like one paper mentioned that idea.
Seems like it would be most useful with something that has lots of seeds per fruiting body. Squash seem reasonable, with that in mind.
Declaring failure after only 12 attempts seems a little half-hearted, especially with tomatoes, which are pretty easy to cross. A lot of papers about interspecific bean crosses involve a hundred or more.
keen101 (Biolumo / Andrew B.): Looking for Goldini Zucchini again. Thinking of setting up my own seed shop for OSSI varieties in the future.
Apr 2, 2022 3:58:57 GMT -5
gratefulseedsaver: I have Goldini seeds. email@example.com
Oct 8, 2022 18:46:12 GMT -5
wilscase: Hello all. My name is Casey Wilson. I'
Oct 18, 2022 21:31:32 GMT -5
wilscase: I'm a graduate student at Oregon State and have been working with populations segrgating for different color genes such as the B gene in Cucurbita. I'm curious if anyone has experience with crosses in Cucurbita maxima between grey blue types and orange?
Oct 18, 2022 21:33:14 GMT -5
wilscase: I have been backcrossing to the grey parent for 4 generations and have finally selfed the heterozygotes (for the Bmax gene) the populations have segregated for diffuse bicolor (pink/blue, orange green), blue green, blue, green, pink (salmon) and orange
Oct 18, 2022 21:36:29 GMT -5
wilscase: The genes involved are Bmax and bl. I have observed that Bmax is incompletely dominant to wild type (green). I have read that bl is incompletely recessive to Bl(wild type). I'm curious if anyone else has observed the behavior of Bmax in a grey/blue type
Oct 18, 2022 21:38:28 GMT -5
wilscase: It appears that bl and Bmax are interacting to produce different shades of salmon and pink.
Oct 18, 2022 21:38:52 GMT -5
wilscase: I'm also interested in any other color genetics, especially the relationships between B and L genes. In the right background these genes can dramatically increase Carotenoids (vitamin A)
Oct 18, 2022 21:40:09 GMT -5
wilscase: I have lots of germplasm and would love to exchange anything that people are interested in
Oct 18, 2022 21:41:56 GMT -5