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Author Topic: 17-11 pummelo x citrumelo hybride  (Read 1786 times)

Ilya11

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17-11 pummelo x citrumelo hybride
« on: May 01, 2017, 04:12:07 AM »
Do we know what happened to this interesting hybrid?
I has not be able to find any further information on it.
In  leaf freeze resistance tests it was shown to have a similiar or even better hardiness than US119.

http://hortsci.ashspublications.org/content/33/4/744.full.pdf
Best regards,
                       Ilya

hardyvermont

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Re: 17-11 pummelo x citrumelo hybride
« Reply #1 on: December 28, 2020, 11:04:05 PM »
Do we know what happened to this interesting hybrid?
I has not be able to find any further information on it.
In  leaf freeze resistance tests it was shown to have a similiar or even better hardiness than US119.

http://hortsci.ashspublications.org/content/33/4/744.full.pdf

Ilya, the link no longer works.  Do you have this information elsewhere?

SoCal2warm

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Re: 17-11 pummelo x citrumelo hybride
« Reply #2 on: December 29, 2020, 02:56:34 AM »
HortScience 33(4):744-748. 1998
Freezing Tolerance and Growth Characteristics of USDA Intergeneric Citrus Hybrids US 119 and Selection 17-11
Milton E. Tignor, Frederick S. Davies, and Wayne B. Sherman
Department of Horticultural Sciences, University of Florida, Gainesville, FL, 32611-0690

Abstract. Two USDA intergeneric, hybrid citrus scions, US 119 {(Citrus paradisi Mac. 'Duncan' x Poncirus trifoliata (L.) Rad.] x C. sinensis Osb. 'Succory'} and selection 17-11 {C. grandis US 145 x [Citrus paradisi Mac. 'Duncan' x P. trifoliata (L.) Raf.]} on 'Swingle' citrumelo (C. paradasi x P. trifoliata) rootstocks were examined for freeze hardiness traits (4 years) and general growth characteristics (2 years). Hardiness was compared with that of 'Hamilin' orange and Satsuman mandarin from Fall 1993 to Spring 1997. As expected, US 119 and 17-11 were both hardier than 'Hamilin' orange as determined by leaf disc electrolyte leakage (EL). Both showed freezing tolerance similar to that of satsuma mandarin, but 17-11 was significantly hardier than satsuma or US 119 at several times during the 4-year study. Trunk diameter and tree height were similar for US 119 and selection 17-11.

A U.S Dept. of Agriculture (USDA) breeding program in Orlando, Fla., has been developing more freeze-hardy citrus scions and rootstocks for many years.

US 119 survived freezes with -12.2 °C minimum air temperature in 1981 (Barrett, 1990). The trees were completely defoliated at this temperature, but bloomed and set fruit during the following year. We observed similar defoliation in both US 119 and 17-11 following two freezes when air temperature reached -10 °C in 1996. In addition, defoliation occurred to a lesser extent when air temperatures reached -9 °C in 1995. In both years defoliation occurred via abscission at the petiole-leaf interface with the petiole remaining on the tree until the spring flush occurred. This indicates less severe freezing injury than dead leaves persisting on a tree following a severe freeze.

Selection 17-11, in addition to being hardier than 'Hamlin' orange, may be potentially hardier than US 119 and satsuma, and therefore is also a potential parent for citrus breeding programs.

The accompanying picture shows, from 17-11, a single leaf, a bifoliate, and a trifoliate leaf, all three have a small winged petiole at the base of the leaf.
Apparently 17-11 displays a mix of mono and trifoliate leaves.


I tried to copy just the most important parts from the article.
« Last Edit: December 29, 2020, 03:01:25 AM by SoCal2warm »

Ilya11

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Re: 17-11 pummelo x citrumelo hybride
« Reply #3 on: December 29, 2020, 04:24:57 AM »
Do we know what happened to this interesting hybrid?
I has not be able to find any further information on it.
In  leaf freeze resistance tests it was shown to have a similiar or even better hardiness than US119.

http://hortsci.ashspublications.org/content/33/4/744.full.pdf

Ilya, the link no longer works.  Do you have this information elsewhere?

https://journals.ashs.org/hortsci/view/journals/hortsci/33/4/article-p744.xml
Best regards,
                       Ilya

Ilya11

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Re: 17-11 pummelo x citrumelo hybride
« Reply #4 on: December 29, 2020, 04:26:33 AM »
Do we know what happened to this interesting hybrid?
I has not be able to find any further information on it.
In  leaf freeze resistance tests it was shown to have a similiar or even better hardiness than US119.

http://hortsci.ashspublications.org/content/33/4/744.full.pdf

Ilya, the link no longer works.  Do you have this information elsewhere?

https://journals.ashs.org/hortsci/view/journals/hortsci/33/4/article-p744.xml
Best regards,
                       Ilya

tedburn

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Re: 17-11 pummelo x citrumelo hybride
« Reply #5 on: December 29, 2020, 04:41:37 AM »
Very interesting, thank you Socal and Ilya.
Does anyone know, what has happened with this 17-11 pummelo x citrumelo hybride, due to the fact that this article is wrutten 1998, is this cultivar bred further are the further characteristica like fruit quality good !

 

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