Tropical Fruit Forum - International Tropical Fruit Growers

Citrus => Cold Hardy Citrus => Topic started by: SoCal2warm on July 07, 2019, 08:22:43 AM

Title: I think I have a hybrid of Ichangquat and 5* Citrumelo
Post by: SoCal2warm on July 07, 2019, 08:22:43 AM
This seed came from Ilya, from an Ichangquat.
But I just noticed something, there was a tiny bifurcation in one of the leaves (something I immediately recognized from my mostly monofoliate citrangequat seedling), and when I looked closer I realized there was also a small bifoliate leaf, with two leaves coming out of the petiole. Obviously this isn't characteristic of Ichangquat, so if it came from Ichangquat, it had to have been pollinated by something else. I know Ilya has a big 5* Citrumelo tree in the vicinity.

(https://i.postimg.cc/YjHvfChp/20190707-050935-0.jpg) (https://postimg.cc/YjHvfChp)
(https://i.postimg.cc/Z9NqpGmB/20190707-050956.jpg) (https://postimg.cc/Z9NqpGmB)

My Ichangquat seedlings have been quite variable in leaf morphology, so I know the seeds from Ichangquat must be zygotic, at least about half of them. This is the first one that's shown any indication of likely trifoliate leafed parentage though.

Maybe Ilya can shed more light on this.
Title: Re: I think I have a hybrid of Ichangquat and 5* Citrumelo
Post by: Ilya11 on July 07, 2019, 08:45:13 AM
Before a year 2000 Bernhardt Voss got the seeds of Ichanquat 6-7-2 hybrid from Florida Research station.
The strongest zygotic seedling was multiplied by him by grafting on poncirus roots.
I got one of such immature plants in 2003, it is now a huge tree , never protected , never damaged ( the lowest temperatures of -16C).
The seeds are  100% monoembryonic . Usually there is  1 seed per 10  fruits. One seed in 4 has green cotyledons typical for its  kumquat ancestor.
Some seedlings have a tendency for bifoliate trait, probably due to a pollination by 5star citrumelo growing nearby.
I have two such seedlings, but they have not flowered up to now.
Title: Re: I think I have a hybrid of Ichangquat and 5* Citrumelo
Post by: bklyn citrus on July 08, 2019, 05:46:21 PM
beautiful photos interesting reading
Title: Re: I think I have a hybrid of Ichangquat and 5* Citrumelo
Post by: SoCal2warm on January 26, 2020, 04:25:35 PM
I just planted it outside into the ground.
(https://i.postimg.cc/9r1j65Xc/20200126-100020.jpg) (https://postimg.cc/9r1j65Xc)
I know it's probably far too early, but the temperatures so far in late January have been surprisingly mild and relatively warm.
(https://i.postimg.cc/vcxNvJ1P/20200126-132015.jpg) (https://postimg.cc/vcxNvJ1P)
Jan 26
Title: Re: I think I have a hybrid of Ichangquat and 5* Citrumelo
Post by: Florian on January 27, 2020, 07:28:44 AM
Seems to be only monofoliate now, right?
Title: Re: I think I have a hybrid of Ichangquat and 5* Citrumelo
Post by: SoCal2warm on February 16, 2020, 07:04:31 PM
Update February 16 (20 days later) the plant looks like it's still doing surprisingly well, even after having been planted out so early.
I was a little surprised.

This was going from inside under optimal growing conditions, with warmth and artificial LED light, to outside in practically the middle of winter. Other hardy citrus varieties that I have suddenly moved from growing inside to outside early in the year have not done that well. (The leaves turn yellow or patchy white, eventually fall off, there has been stem die-back sometimes, even when outside temperatures have remained above freezing)
To me, this seems to indicate remarkable resiliency. All the newest little leaf growth still appears green and healthy.

(However, this has been a good year, and almost all the other hardy citrus, even marginal varieties, appear to be doing very good left outside, having gone through the winter)

This looks like a plant that can handle sudden temperature change shock well.
Title: Re: I think I have a hybrid of Ichangquat and 5* Citrumelo
Post by: SoCal2warm on July 18, 2020, 11:58:10 PM
The plant ended up defoliating, and there was side branch die-back. The main trunk stem is still deep green and healthy looking though. It has just started to put out some new leaflet growth from two of the less damaged little branches.
(https://i.postimg.cc/3W8dXb97/20200718-204511.jpg) (https://postimg.cc/3W8dXb97)(https://i.postimg.cc/0rVrcdHS/20200718-204525.jpg) (https://postimg.cc/0rVrcdHS)

If this behaves like Yuzu seedlings I have planted in the past, this may be able to recover.
I probably shouldn't have transferred it outside in January, but I think it would have struggled with the transition outside no matter what time of the year I moved it, it seems from my prior experience doing this.

That it is sending out new leaf growth is a very good sign.

My other Ichangquat seedling still has all its leaves from last year, they are green and alive but kind of pale and yellowish, not the healthiest color, and the plant has put on absolutely no new leaf growth so far. It is alive so I am waiting for signs of leaf growth. So far it appears less resilient than Yuzu seedlings.
Title: Re: I think I have a hybrid of Ichangquat and 5* Citrumelo
Post by: SoCal2warm on August 11, 2020, 11:42:33 AM
It's growing out leaves well now, and they are a healthy dark green color
(https://i.postimg.cc/vgswtNh2/20200810-121718.jpg) (https://postimg.cc/vgswtNh2)
Aug 11
Title: Re: I think I have a hybrid of Ichangquat and 5* Citrumelo
Post by: SoCal2warm on September 05, 2020, 01:13:33 AM
An update: The seedling appears to be doing well, has put on more growth. (September 4, 2020 now)

The fact that it was able to recover so well after being transferred outside into the ground in late January is I think a very good indicator.

When I had previously transferred out an Arctic Frost from inside to outside in early March during a previous year, it ended up suffering severe die-back and almost the entire top was killed back, and then it took a very long time to start recovering a grow out a new branch. (Though the plant ultimately was not able to survive through the following winter, which was unusually cold that year)
So I think I definitely can say this is more resilient than Arctic Frost.


Seems to be only monofoliate now, right?
Yes indeed. I only see regular monofoliate leaves on it now.


Meanwhile, another Ichangquat seedling (this one a normal one) which is in the ground still has not grown out a single leaf, although it still has its leaves from last year, which do not look healthy and are more pale and yellowish but still have some hue of green and appear to be alive (though perhaps not functional). The skinny trunk of the plant looks to be a healthier green color and is definitely still alive. Although I see little marks of grey on the green stems that indicate frost damage from the winter (looks to be fairly mild).

Of course it could be that this particular seedling lacks the cold tolerance of the parent it came from. It is only one seedling so it is difficult to compare.