Author Topic: Vasconcellea pubescens (papayuela/papayuelo) males  (Read 2167 times)

KarenRei

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Vasconcellea pubescens (papayuela/papayuelo) males
« on: December 31, 2014, 10:19:19 AM »
So, I have two papayuela trees. One is about a meter and a half tall and is constantly covered in male flowers. The other is under a meter tall and had nearly died during an "indoor heat wave" that caused me a lot of devastation a while back. It's now recovered and is just starting getting ready to flower for the first time. Unfortunately, the buds look just like the buds on the other one, and thus I assume that it's also a male.

I know that Vasconcelleas are in general "mostly monoecious". Sometimes there's two sex plants, sometimes you can get a sex reversal (such as from trauma or certain chemicals), etc, but usually they're either one sex or the other.  In the cases of sex reversal I've read differenting reports about the quality of the fruit and don't know that even if I could induce it whether the resultant seeds would be viable.

I also have a lot of new seeds of vasconcellia monoica. While none have sprouted yet, they seem to be in good shape - one or two molded right away while the others have shown no signs despite being in the same environment, providing encouragement that those couple were dead while the others are quite alive and doing fine.  So a few questions.

1) If I ended up with females of V. monoica, could V. pubescens act as a pollinator?
2) Could one backbreed V. pubescens hybrids?
3) Don't vasconcelleas generally have short lifespans? So is it even likely that my males will be around and healthy after the next generation or two of Vasconcellea seedlings?
4) What would you recommend? My growing space is of course limited. Should I try to induce female flowers via trauma (such as removing of growing tips), or simply hope that one turns out to produce both sex flowers on its own? Should I try to import chemicals to induce female flowers? Should I try to import more V. pubescens seeds, hope they make it and germinate, then wait a few more years and hope there's females in the mix? Or just simply move the V. pubescens into a poorer position in my grow room the next time I rearrange and free up their space for more plants that have a chance of fruiting?
« Last Edit: December 31, 2014, 04:34:17 PM by KarenRei »
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KarenRei

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Re: Vasconcellea pubescens (papayuela/papayuelo) males
« Reply #1 on: December 31, 2014, 04:30:31 PM »
Hmm, interesting!

http://davesgarden.com/guides/pf/go/222475/

Quote
PlantFiles: Mountain Papaya
Vasconcellea pubescens x monoica 'Martin Grantham Hybrid'

This was made by Martin Grantham at SFSU, so for lack of another name, I just gave him as the hybridizer. The hybrid has been previously made with the same species, but I suspect any clones in the U.S. are of Martin's seedlings (or perhaps their descendents). The plants are all female, but are parthenocarpic (produce fruit without a male plant) and sometimes also produce seeds. The fruit is not highly flavored, at least the one I tasted raw. The plant is spectacular full of fruit, and it is attractive even without. I think it is a cool grower, given the parents, and is also damaged (or killed) by below freezing temperatures.

The hybrid not only works but is is parthenocarpic? Very cool! Also it should be mentioned that monoica is usually bland, it's not normally eaten raw - what I've read is that it's usually cooked and sometimes mixed with other fruits, juices, and/or sugar; they supposedly end up sort of like stewed apricots. Also, the leaves are eaten.  Plus they just look really neat.

I think trying for a hybrid would be reason enough to keep my male V. pubescens around.  :)
« Last Edit: December 31, 2014, 04:39:19 PM by KarenRei »
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Re: Vasconcellea pubescens (papayuela/papayuelo) males
« Reply #2 on: December 31, 2014, 05:07:31 PM »
The papayuelos live about 5 years. You would need to hand pollinate to attempt a hybrid. Personally i would just grow more papayuelo seeds.
Oscar

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Re: Vasconcellea pubescens (papayuela/papayuelo) males
« Reply #3 on: December 31, 2014, 07:23:45 PM »
I believe Hybrids are possible though
- David Antonio Garcia

KarenRei

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Re: Vasconcellea pubescens (papayuela/papayuelo) males
« Reply #4 on: January 01, 2015, 09:33:50 AM »
Okay, thanks!
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greenman62

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Re: Vasconcellea pubescens (papayuela/papayuelo) males
« Reply #5 on: January 01, 2015, 12:54:27 PM »
i was looking to do some crossing a while back
my pubescens were bad the first time
the second time i forgot them outside when i went on vacation.
i just got some monoica seeds in though.

i have some links i saved if you want
it may (or may not) have the info you want
some is kinda interesting anyway.

(even though some links say papaya, they might have info on Vasconcellea  too)

------------------------

Rapid divergence and expansion of the X chromosome in papaya.
http://www.ncbi.nlm.nih.gov/pubmed/22869742

The origin of the non-recombining region of sex chromosomes in Carica and Vasconcellea.
http://www.ncbi.nlm.nih.gov/pubmed/20579309

A dated phylogeny of the papaya family (Caricaceae) reveals the crop's closest relatives and the family's biogeographic history.
http://www.ncbi.nlm.nih.gov/pubmed/22659516


THE AMBISEXUAL FORM OF Carica pubescens LennÚ at Koch ANALIZED IN INTERSPECIFIC CROSSES
http://www.caryologia.unifi.it/past_volumes/61_4/1530.pdf

Interspecific hybridization of papaya with other Carica species
http://agris.fao.org/agris-search/search.do?recordID=US8933375

Fluorescent in situ hybridization of 18S and 5S rDNA in papaya
(Carica papaya l.) and wild relatives
http://www.caryologia.unifi.it/past_volumes/61_4/1530.pdf

 

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