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Cold Hardy Citrus / Re: Want To Know A Lot About Cold Hardy Citrus Varieties?
« on: April 23, 2018, 06:40:49 PM »
Okay, thanks Millet.
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Cold Hardy Citrus / Re: Swamp Lemon Adventure!
« on: April 23, 2018, 06:39:28 PM »
Is anyone growing the swamp lemon mentioned from the post? Terry sent some fruit around, so I assume someone is growing it outside of it's original collection spot.
3
Cold Hardy Citrus / Re: Want To Know A Lot About Cold Hardy Citrus Varieties?
« on: April 23, 2018, 05:39:45 PM »
I know this is an old post, but when I download the booklet the last two pages (18 and 19) are blank. Anyone else?
4
Citrus General Discussion / Re: The Fragrance of Citrus in Bloom
« on: April 17, 2018, 02:53:19 PM »
I love the smell of Citrus blossoms. I used to have a grove behind my backyard in Florida, which smelled amazing.
Also, Okitsu fruit are delicious.
Ethan
Also, Okitsu fruit are delicious.
Ethan
5
Cold Hardy Citrus / Re: Long term cold hardy citrus breeding project
« on: April 11, 2018, 06:58:39 PM »
Hi Mikkel,
A lot of my hybrids were small plants when I left, so I can't report on their edibility. I do know the particular strain of C. ichangensis I had was not very edible. I'm sure there are better, more edible examples of the species. So the hybrids I made between C. ichangensis and P. trifoliata will likely be evaluated as rootstocks.
Precocity in Microcitrus hybrids seems to be easily passed on. I made some triploid hybrids that were 1/3 finger lime and 2/3 lime or lemon, that flowered after a year. This was surprising, given that finger lime was in the genetic minority. One I sampled I know was self fruitful in the greenhouse and was seedless, which we were aiming for, but the resiny finger lime flavor was also dominant (We also had limited genetics available for finger limes, as most I used were seedlings from California, and there are probably better tasting selections. I know more are in the process of being imported from Australia. It's a long process of importing and cleaning up for budwood release.) I've grown other seedlings that also flowered when a year old. Finger limes also tend to flower multiple times in the year, not just in spring.
The Microcitrus x Poncirus hybrids were also small when I left, which I made last year, so I can't comment on precocity or fruit quality.
Here's an illustration of Microcitrus hybrids I made from my dissertation: EXPLOITATION OF PUMMELO (CITRUS MAXIMA (BURM.) MERRILL) THROUGH BREEDING, PLOIDY MANIPULATION, AND INTERSTOCKS FOR IMPROVEMENT OF CULTIVATED CITRUS; Ethan Nielsen, University of Florida, December 2017.
A lot of my hybrids were small plants when I left, so I can't report on their edibility. I do know the particular strain of C. ichangensis I had was not very edible. I'm sure there are better, more edible examples of the species. So the hybrids I made between C. ichangensis and P. trifoliata will likely be evaluated as rootstocks.
Precocity in Microcitrus hybrids seems to be easily passed on. I made some triploid hybrids that were 1/3 finger lime and 2/3 lime or lemon, that flowered after a year. This was surprising, given that finger lime was in the genetic minority. One I sampled I know was self fruitful in the greenhouse and was seedless, which we were aiming for, but the resiny finger lime flavor was also dominant (We also had limited genetics available for finger limes, as most I used were seedlings from California, and there are probably better tasting selections. I know more are in the process of being imported from Australia. It's a long process of importing and cleaning up for budwood release.) I've grown other seedlings that also flowered when a year old. Finger limes also tend to flower multiple times in the year, not just in spring.
The Microcitrus x Poncirus hybrids were also small when I left, which I made last year, so I can't comment on precocity or fruit quality.
Here's an illustration of Microcitrus hybrids I made from my dissertation: EXPLOITATION OF PUMMELO (CITRUS MAXIMA (BURM.) MERRILL) THROUGH BREEDING, PLOIDY MANIPULATION, AND INTERSTOCKS FOR IMPROVEMENT OF CULTIVATED CITRUS; Ethan Nielsen, University of Florida, December 2017.
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Cold Hardy Citrus / Re: Long term cold hardy citrus breeding project
« on: April 09, 2018, 04:24:14 PM »
Hi Walt and everyone,
I would love to be able to help on this project, as I have some experience with breeding citrus. My PhD dissertation was on breeding pummelo (Citrus maxima), but I also worked breeding other Citrus. I made a ton of hybrids with Australian Citrus species, which are under evaluation currently at University of Florida. I also made a few hybrids between C. ichangensis and Poncirus trifoliata, which are also at University of Florida. Essentially, all the cool stuff I made are still at University of Florida. Breeding for cold tolerance was not high on our list, as Florida tends to stay pretty warm, and often some tolerance from the rootstock was enough for the tree to survive the occasional cold periods.
It's difficult select purely for cold tolerance, as different factors can affect the tolerance of a particular plant, but recurrent selection using Poncirus with near edible fruit sounds like a good start. I have a some seeds I just started that came from a tree that was 1/4 Poncirus (probably, it makes large, mostly edible fruit and has trifoliate leaves), which I will gladly share material of when I have some to share (legally, of course).
I would also put precocity high on the list; there are some good sources that I would start with. I heard mention of a precocious Poncirus, which is great, but also I would recommend finger limes or desert limes as I know those often flower in a year from seed. So does Fortunella polyandra, but it's fruits aren't so great. Citrus wakonai would also be good if we could get our hands on it.
Below is a picture of a Citrus (Microcitrus) australasica x Poncirus trifoliata hybrid I made at University of Florida.
Cheers,
Dr. Ethan Nielsen
I would love to be able to help on this project, as I have some experience with breeding citrus. My PhD dissertation was on breeding pummelo (Citrus maxima), but I also worked breeding other Citrus. I made a ton of hybrids with Australian Citrus species, which are under evaluation currently at University of Florida. I also made a few hybrids between C. ichangensis and Poncirus trifoliata, which are also at University of Florida. Essentially, all the cool stuff I made are still at University of Florida. Breeding for cold tolerance was not high on our list, as Florida tends to stay pretty warm, and often some tolerance from the rootstock was enough for the tree to survive the occasional cold periods.
It's difficult select purely for cold tolerance, as different factors can affect the tolerance of a particular plant, but recurrent selection using Poncirus with near edible fruit sounds like a good start. I have a some seeds I just started that came from a tree that was 1/4 Poncirus (probably, it makes large, mostly edible fruit and has trifoliate leaves), which I will gladly share material of when I have some to share (legally, of course).
I would also put precocity high on the list; there are some good sources that I would start with. I heard mention of a precocious Poncirus, which is great, but also I would recommend finger limes or desert limes as I know those often flower in a year from seed. So does Fortunella polyandra, but it's fruits aren't so great. Citrus wakonai would also be good if we could get our hands on it.
Below is a picture of a Citrus (Microcitrus) australasica x Poncirus trifoliata hybrid I made at University of Florida.
Cheers,
Dr. Ethan Nielsen
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Tropical Fruit Discussion / Attention lovers of Passion Fruit
« on: April 07, 2015, 04:51:40 PM »
Hey all,
I'm hosting the Passiflora Online Kedada*of Central Florida, the first of what I hope is of many more to come. Anyone is welcome to come and trade cuttings or seeds, and we'll have a potluck lunch.
Come meet like-minded people to share information and plants! Make your cuttings now and get them rooted in time to trade for some new additions to your garden.
There will be:
• Socializing!
• Cutting/plant trading! (Rooted plants preferable, doesn't have to be just Passiflora.)
• Grafting demonstration! (Bring a rootstock if you would like to try it yourself. P. caerulea or 'Incense' is ideal, but others will work.)
• Field trip! Find Passiflora incarnata in the wild! (We will visit a nearby field, so dress appropriately to tromp through tall grass.)
• Potluck lunch! Bring some food or drink to share.
If you would like to attend please message me for my address, and what you will bring for lunch. Haines City is midway between Orlando and Tampa. Bring your families, all are welcome, and my kids will enjoy the entertainment.
Please RSVP by April 11, 2015, and I will tell you my address. Send me a message either here or on Facebook.
*(Kedada is a Spanish word that means a meeting organized over the internet. @[NjQyMTgzOTU5MjA4MTA3Omh0dHBcYS8vd3d3LndvcmRyZWZlcmVuY2UuY29tL2VzL2VuL3RyYW5zbGF0aW9uLmFzcD9zcGVuPWtlZGFkYTo6:http://www.wordreference.com/es/en/translation.asp?spen=kedada])
Link to event page on Facebook: https://www.facebook.com/events/322982084567451/
I'm hosting the Passiflora Online Kedada*of Central Florida, the first of what I hope is of many more to come. Anyone is welcome to come and trade cuttings or seeds, and we'll have a potluck lunch.
Come meet like-minded people to share information and plants! Make your cuttings now and get them rooted in time to trade for some new additions to your garden.
There will be:
• Socializing!
• Cutting/plant trading! (Rooted plants preferable, doesn't have to be just Passiflora.)
• Grafting demonstration! (Bring a rootstock if you would like to try it yourself. P. caerulea or 'Incense' is ideal, but others will work.)
• Field trip! Find Passiflora incarnata in the wild! (We will visit a nearby field, so dress appropriately to tromp through tall grass.)
• Potluck lunch! Bring some food or drink to share.
If you would like to attend please message me for my address, and what you will bring for lunch. Haines City is midway between Orlando and Tampa. Bring your families, all are welcome, and my kids will enjoy the entertainment.
Please RSVP by April 11, 2015, and I will tell you my address. Send me a message either here or on Facebook.
*(Kedada is a Spanish word that means a meeting organized over the internet. @[NjQyMTgzOTU5MjA4MTA3Omh0dHBcYS8vd3d3LndvcmRyZWZlcmVuY2UuY29tL2VzL2VuL3RyYW5zbGF0aW9uLmFzcD9zcGVuPWtlZGFkYTo6:http://www.wordreference.com/es/en/translation.asp?spen=kedada])
Link to event page on Facebook: https://www.facebook.com/events/322982084567451/
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