Somatic hybridization for citrus rootstock breeding: an effective tool to solve some important issues of the Mediterranean citrus industry

2011 ◽  
Vol 30 (5) ◽  
pp. 883-900 ◽  
Author(s):  
Dominique Dambier ◽  
Hamid Benyahia ◽  
Giovanni Pensabene-Bellavia ◽  
Yildiz Aka Kaçar ◽  
Yann Froelicher ◽  
...  
Keyword(s):  
Somatic Hybridization ◽  
Citrus Industry ◽  
Citrus Rootstock ◽  
The Mediterranean ◽  
Rootstock Breeding

scholarly journals Intermediate Inheritance with Disomic Tendency in Tetraploid Intergeneric Citrus × Poncirus Hybrids Enhances the Efficiency of Citrus Rootstock Breeding

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1961
Author(s):  
Leny Calvez ◽  
Alexis Dereeper ◽  
Pierre Mournet ◽  
Yann Froelicher ◽  
Saturnin Bruyère ◽  
...  
Keyword(s):  
Genetic Map ◽  
Snp Markers ◽  
Poncirus Trifoliata ◽  
High Rate ◽  
Citrus Industry ◽  
Citrus Rootstock ◽  
Genetic Value ◽  
New Generation ◽  
Diploid Gametes ◽  
Rootstock Breeding

Rootstocks are crucial for the sustainability of the citrus industry worldwide. Diploid intergeneric Citrus × Poncirus hybrids have contributed considerably to citrus rootstock improvement and their tetraploid (doubled-diploid) forms are important resources for the creation of a new generation of tetraploid rootstocks. To optimize the efficiency of tetraploid rootstock breeding strategies, more knowledge is required on inheritance in the allotetraploid genitors. A set of 159 new SNP markers that fully distinguish Poncirus trifoliata (L.) Raf. from Citrus species was developed from polymorphisms mined in GBS data and used to establish a genetic map of tetraploid citrumelo (C. × paradisi Macfad. × P. trifoliata) and to analyze the meiotic behavior of tetraploid citrumelo and citrandarin (C. reticulata Blanco × P. trifoliata). The tetraploid citrumelo genetic map was highly syntenic and collinear with the clementine reference genome. The apparent intergeneric recombination rate was strongly limited by high preferential chromosome pairing, resulting in intermediate inheritance with disomic tendency. Such inheritance, also observed in tetraploid citrandarin, results in the transmission by the diploid gametes of a high rate of intergeneric heterozygosity. It is therefore expected that a large part of the genetic value selected in the original diploid intergeneric rootstock is transmitted to the tetraploid sexual progenies.

Ships, Bread, and Work: Agrarian Conflict in the Mediterranean Countryside, 1914–1923

2018 ◽  
Vol 94 ◽  
pp. 27-54
Author(s):  
Julia Hudson-Richards
Keyword(s):  
World War I ◽  
Working Conditions ◽  
Economic Stress ◽  
World War ◽  
Citrus Industry ◽  
Working Classes ◽  
The Mediterranean ◽  
Work Contracts

AbstractThis article examines the collapse of the citrus industry in València, Spain during the last years of World War I. In it, I argue that the strikes represent a key moment in the proletarianization of the region's agricultural working classes. By 1914, citrus had become one of Spain's most profitable exports, and prior to the 1917 crash, the landed and monied interests in control of the industry had enforced the notion of inter-class cooperation, which broke down under the economic stress of the War. In the wake of the collapse and the strikes that followed, workers began to organize in earnest and began to work towards improving working conditions and establishing fairer work contracts.

Citrus Rootstock Breeding and Selection

2020 ◽  
pp. 49-74 ◽  
Author(s):  
Maria Angeles Forner-Giner ◽  
Alberto Continella ◽  
Jude W. Grosser
Keyword(s):  
Citrus Rootstock ◽  
Rootstock Breeding

scholarly journals Citrus rootstock breeding: response of four allotetraploid somatic hybrids to Citrus tristeza virus induced infections

2018 ◽  
Vol 153 (3) ◽  
pp. 837-847 ◽  
Author(s):  
Loredana Abbate ◽  
Stefano Panno ◽  
Francesco Mercati ◽  
Salvatore Davino ◽  
Sergio Fatta Del Bosco
Keyword(s):  
Citrus Tristeza Virus ◽  
Somatic Hybrids ◽  
Citrus Rootstock ◽  
Tristeza Virus ◽  
Citrus Tristeza ◽  
Rootstock Breeding

scholarly journals Somatic Hybridization of Complementary Citrus Rootstock:Five New Hybrids

HortScience ◽  
1994 ◽  
Vol 29 (7) ◽  
pp. 812-813 ◽  
Author(s):  
Jude W. Grosser ◽  
Frederick G. Gmitter ◽  
J.L. Chandler ◽  
Eliezer S. Louzada
Keyword(s):  
Somatic Hybrid ◽  
Somatic Hybridization ◽  
Poncirus Trifoliata ◽  
Sour Orange ◽  
Trifoliate Orange ◽  
Hybrid Plants ◽  
Regenerated Plants ◽  
Citrus Rootstock ◽  
Sexual Hybrid ◽  
Cleopatra Mandarin

Protoplasm culture following polyethylene glycol-induced fusion resulted in the regeneration of tetraploid somatic hybrid plants from the following attempted parental combinations: Cleopatra mandarin (Citrus reticulata Blanco) + Argentine trifoliate orange [Poncirus trifoliata (L.) Raf.]; `Succari' sweet orange [C. sinensis (L.) Osb.] + Argentine trifoliate orange; sour orange (C. aurantium L.) + Flying Dragon trifoliate orange (P. trifolita); sour orange + Rangpur (C. limonia Osb.); and Milam lemon (purported sexual hybrid of C. jambhiri Lush × C. sinensis) + Sun Chu Sha mandarin (C. reticulate Blanco). Protoplasm isolation, fusion, and culture were conducted according to previously published methods. Regenerated plants were classified according to leaf morphology, chromosome number, and peroxidase, phosphoglucomutase, and phosphoglucose isomerase leaf isozyme profiles. All of the somatic hybrid plants were tetraploid, as expected (2n = 4x = 36), and all five selections have been propagated and entered into commercial citrus rootstock trials.

scholarly journals ‘Candidatus Liberibacter Solanacearum’ Is Unlikely to Be Transmitted Spontaneously from Infected Carrot Plants to Citrus Plants by Trioza Erytreae

Insects ◽  
2020 ◽  
Vol 11 (8) ◽  
pp. 514 ◽  
Author(s):  
María Quintana-González de Chaves ◽  
Gabriela R. Teresani ◽  
Estrella Hernández-Suárez ◽  
Edson Bertolini ◽  
Aránzazu Moreno ◽  
...  
Keyword(s):  
Citrus Industry ◽  
Mainland Portugal ◽  
Trioza Erytreae ◽  
Candidatus Liberibacter ◽  
Citrus Huanglongbing ◽  
Efficient Vector ◽  
Inoculation Access Period ◽  
The Mediterranean ◽  
Low Efficiency ◽  
The Mediterranean Basin

Bacteria belonging to ‘Candidatus Liberibacter spp.’ are associated with various severe diseases in the five continents. The African citrus psyllid Trioza erytreae (Hemiptera: Triozidae) is an efficient vector of citrus huanglongbing-HLB disease, absent in the Mediterranean basin. This psyllid is currently present in the islands and mainland Portugal and Spain, where the prevalence of ‘Ca. Liberibacter solanacearum’ (CaLsol) associated to a carrot disease is high. Trioza erytreae normally feeds on citrus plants but has also been observed on other crops. It would be a great concern to the Mediterranean citrus industry if T. erytreae could transmit this bacterium from carrots to citrus and cause disease; therefore, the transmission of CaLsol from carrot plants to citrus plants was experimentally assessed. Although CaLsol was initially detected on receptor citrus plants in transmission assays by dodder and budding, the infection was not established. The feeding behavior by electrical penetration graphs and oviposition of T. erytreae on carrot plants versus citrus plants was evaluated. Trioza erytreae only reached the phloem in citrus plants. However, it was able to acquire CaLsol from infected carrots but unable to transmit it to citrus plants. CaLsol was detected in some carrot plants immediately after 7 and 14 days (inoculation access period), but it was not detected after one month. Trioza erytreae was unable to complete its life cycle on carrot plants. In conclusion, the efficient vector of bacteria associated to huanglongbing was unable to transmit CaLsol from carrot to citrus plants, but it acquired and transmitted the bacterium from carrot to carrot plants with low efficiency.

scholarly journals Citrus Rootstock Usage, Characteristics, and Selection in the Florida Indian River Region

2002 ◽  
Vol 12 (1) ◽  
pp. 143-147 ◽  
Author(s):  
Ed Stover ◽  
William Castle
Keyword(s):  
Calcium Content ◽  
Economic Consequences ◽  
Poncirus Trifoliata ◽  
Sour Orange ◽  
Citrus Industry ◽  
River Region ◽  
Citrus Rootstock ◽  
Overall Evaluation ◽  
Indian River ◽  
Rate Of Decline

Sour orange (Citrus aurantium) has been the dominant citrus rootstock in the Indian River region of Florida since the initial plantings in the 1880s. Use of this rootstock in new plantings has been rare since 1990 because of heightened concern about decline strains of citrus tristeza virus (CTV), to which this rootstock is highly susceptible. Because the proportion of trees remaining on sour orange rootstock and the rate of decline among them are important in predicting the economic consequences for the Indian River citrus industry, two surveys of rootstock usage were conducted for citrus in this growing region. In the first survey, growers were asked about rootstock usage and problems observed across all types of citrus, and responses represented 35% of acreage. In the second survey, growers were restricted to rootstock usage and grower observations on decline for grapefruit (C. paradisi), and responses represented 53% of acreage. Even though 44% of all current Indian River grove area has been planted since 1987, when use of sour orange for new plantings largely ceased, 48% of all citrus and 55% of all grapefruit grove area are currently on sour orange rootstock. The percentage of grapefruit trees on sour orange rootstock that showed significantly health decline in 2000 was 8% based on grower reports. The other root-stocks representing substantial commercial grove area have known problems and limitations that are likely to prevent any of them from gaining the prominence once held by sour orange. Swingle citrumelo (C. paradisi × Poncirus trifoliata) at about 25% of grove area, Cleopatra mandarin (Citrus reticulata) at about 8%, and Smooth Flat Seville (Citrus hybrid) at about 3% all represented similar acreage for grapefruit and across all cultivars, while Carrizo citrange (C. sinensis × P. trifoliata) use was reported for 4% of grapefruit and 13% overall. Evaluation and development of new rootstocks is vitally important for the Indian River area, especially for soils with significant clay and calcium content.

Sign in / Sign up

Export Citation Format

Share Document