Mandarin

14,000,000 Leading Edge Experts on the ideXlab platform

Scan Science and Technology

Contact Leading Edge Experts & Companies

Scan Science and Technology

Contact Leading Edge Experts & Companies

The Experts below are selected from a list of 45333 Experts worldwide ranked by ideXlab platform

Zhiqin Zhou - One of the best experts on this subject based on the ideXlab platform.

  • phenolic compositions and antioxidant capacities of chinese wild Mandarin citrus reticulata blanco fruits
    Food Chemistry, 2014
    Co-Authors: Yuanmei Zhang, Yujing Sun, Yan Shen, Liping Qiao, Liezhou Zhong, Zhiqin Zhou
    Abstract:

    As one of the most important centres of origin for the genus Citrus L., China is rich in wild Mandarin germplasm. In this study, phenolic compounds in the peels of 14 wild Mandarin genotypes native to China were determined and their antioxidant capacities were evaluated using DPPH, FRAP, ABTS and ORAC methods. We found that Nieduyeju had the highest total phenol content (51.14 mg/g DW), and Wulongsuanju had the highest total flavonoid content (20.66 mg/g DW). Hesperidin, the dominant flavonoid, was observed to be highest in Guangxihongpisuanju (55.98 mg/g DW). Ferulic acid was the most abundant phenolic acid analyzed, and Nieduyeju (7780.17 μg/g DW) and Guangxihongpisuanju (13,607.19 μg/g DW) had the highest contents of extractable and bound phenolic acid, respectively. Antioxidant potency composite (APC) index showed obvious variations ranging from 58.84 to 98.89 in the studied wild Mandarins, among them, Nieduyeju had the highest APC index. Overall, Guangxihongpisuanju, Nieduyeju, Cupigoushigan and Daoxianyeju contained more phenolics and exhibited higher antioxidant capacities than the Mandarin cultivars Satsuma and Ponkan.

  • phenolic composition of chinese wild Mandarin citrus reticulata balnco pulps and their antioxidant properties
    Industrial Crops and Products, 2014
    Co-Authors: Yuanmei Zhang, Yujing Sun, Yan Shen, Zhiqin Zhou
    Abstract:

    Abstract As one of the most important centers of origin for the genus Citrus L., China is rich in wild Mandarin germplasm. In this study, phenolic compounds in the fruit pulps of 14 wild Mandarins ( Citrus reticulata Blanco.) native to China were determined and their antioxidant capacities were evaluated by the DPPH, FRAP, ABTS, and ORAC methods. We found that Nieduyeju had the highest total phenolic content (22.26 ± 0.64 mg/g DW), and Wangcangzhoupigan had the highest total flavonoid content (3.82 ± 0.19 mg/g, DW). Hesperidin was the dominant flavonoid, and Guangxihongpisuanju (22.13 ± 0.33 mg/g DW) was with the highest content of this flavonoid among the 14 samples studied. Ferulic acid was the most abundant phenolic acid, and Nieduyeju (2336.07 ± 145.66 μg/g, DW) was with the highest extractable ferulic acid, while Guangxihongpisuanju (170.28 ± 5.03 μg/g, DW) was with the highest bound ferulic acid. Additionally, the overall antioxidant potency composite (APC) index showed obvious variations in the citrus fruits examined (52.26–88.73). The wild citrus fruits Nieduyeju, Wangcangzhoupigan and Guangxihongpisuanju presented significantly higher APC indices than the Mandarin cultivars Satsuma and Ponkan ( p

Javier Terol - One of the best experts on this subject based on the ideXlab platform.

  • complex history of admixture during citrus domestication revealed by genome analysis
    Nature Biotechnology, 2014
    Co-Authors: Albert G Wu, Simon Prochnik, Simone Scalabrin, Jerome Salse, Florent Murat, Xavier Perrier, Uffe Hellsten, Jerry Jenkins, Manuel Ruiz, Javier Terol
    Abstract:

    Author(s): Wu, G. Albert; Prochnik, Simon; Jenkins, Jerry; Salse, Jerome; Hellsten, Uffe; Murat, Florent; Perrier, Xavier; Ruiz, Manuel; Scalabrin, Simone; Terol, Javier; Takita, Marco Aurélio; Labadie, Karine; Poulain, Julie; Couloux, Arnaud; Jabbari, Kamel; Cattonaro, Federica; Fabbro, Cristian Del; Pinosio, Sara; Zuccolo, Andrea; Chapman, Jarrod; Grimwood, Jane; Tadeo, Francisco; Estornell, Leandro H.; Mu?oz-Sanz, Juan V.; Ibanez, Victoria; Herrero-Ortega, Amparo; Aleza, Pablo; Pérez, Julián Pérez; Ramon, Daniel; Brunel, Dominique; Luro, Francois; Chen, Chunxian; Farmerie, William G.; Desany, Brian; Kodira, Chinnappa; Mohiuddin, Mohammed; Harkins, Tim; Fredrikson, Karin; Burns, Paul; Lomsadze, Alexandre; Borodovsky, Mark; Reforgiato, Giuseppe; Freitas-Astua, Juliana; Quetier, Francis; Navarro, Luis; Roose, Mikeal; Wincker, Patrick; Schmutz, Jeremy; Morgante, Michele; Machado, Marcos Antonio; Talon, Manuel; Jaillon, Olivier; Ollitrault, Patrick; Gmitter, Frederick; Rokhsar, Daniel | Abstract: Although Citrus is the most globally significant tree fruit, its domestication history is poorlyunderstood. Cultivated citrus types are believed to comprise selections from and/or hybrids of several wild progenitor species, but the identities of these progenitors, and their contribution to modern cultivars, remain controversial. Here we report the genomes of a collection of Mandarins, pummelos, and oranges, including a high quality reference sequence from a haploid Clementine Mandarin. By comparative genome analysis we show that these cultivated types can be derived from two progenitor species. Cultivated pummelos represent selections from a single progenitor species C. maxima. Unexpectedly, however, we find that cultivated Mandarins are introgressions of C. maxima into a distinct second population that we identify with the ancestral wild Mandarin species C. reticulata. Sweet and sour oranges are found to be interspecific hybrids. Sweet orange, the most widely cultivated citrus, arose as the offspring of previously admixed individuals. In contrast, sour (or Seville) orange is an F1 hybrid of pure C. maxima and C. reticulata parents, implying that wild Mandarins were part of the early breeding germplasm.Surprisingly, we also find that a wild Chinese Mandarin from Mangshan, China showssubstantial sequence divergence from C. reticulata and appears to represent a distinct taxon.Understanding the relationships and phylogeny of cultivated citrus through genome analysis will clarify taxonomic relationships and enable previously inconceivable opportunities for sequence-directed genetic improvement.Citrus are widely consumed worldwide as juice or fresh fruit, providing important sources ofvitamin C and other health-promoting compounds. Global production in 2012 exceeded 86million metric tons, with an estimated value of US$9 billion (http://www.fas.usda.gov/psdonline/circulars/citrus.pdf). The very narrow genetic diversity of cultivated citrus makes it highly vulnerable to disease outbreaks, including citrus greening disease (also known as Huanglongbing) that is rapidly spreading throughout the world's major citrus producing regions1. Understanding the population genomics and domestication of citrus will enable strategies for improvements to citrus including resistance to greening and otherdiseases. The domestication and distribution of edible citrus types began several thousand years ago in Southeast Asia and spread globally following ancient land and sea routes. The lineages that gave rise to most modern cultivated varieties, however, are lost in undocumented antiquity, and their identities remain controversial2, 3. Several features of Citrus biology and cultivation make deciphering these origins difficult. Cultivated varieties are typically propagated clonally by grafting and through asexual seed production (apomixis via nucellar polyembryony) to maintain desirable combinations of traits (Fig. 1). Thus many important cultivar groups have characteristic basic genotypes that presumably arose through interspecific hybridization and/or successive introgressive hybridizations of wild ancestral species. These domestication events predated the global expansion of citrus cultivation by hundreds or perhaps thousands of years, with no record of the domestication process. Diversity within such groups arises through accumulated somatic mutations, generally without sexual recombination, either as limb sports on trees or variants among apomictic seedling progeny.Two wild species are believed to have contributed to domesticated pummelos, Mandarins and oranges. Based on morphology and genetic markers, pummelos have generally been identified with the wild species C. maxima (Burm.) Merrill that is indigenous to Southeast Asia. Although Mandarins are similarly widely identified with the species C. reticulata Blanco 4-6, wild populations of C. reticulata have not been definitively described. Various authors have taken dif

  • Sequencing of diverse Mandarin, pummelo and orange genomes reveals complex history of admixture during citrus domestication
    Nature Biotechnology, 2014
    Co-Authors: G. Albert Wu, Simon Prochnik, Simone Scalabrin, Jerome Salse, Florent Murat, Xavier Perrier, Uffe Hellsten, Jerry Jenkins, Manuel Ruiz, Javier Terol
    Abstract:

    Cultivated citrus are selections from, or hybrids of, wild progenitor species whose identities and contributions to citrus domestication remain controversial. Here we sequence and compare citrus genomes-a high-quality reference haploid clementine genome and Mandarin, pummelo, sweet-orange and sour-orange genomes-and show that cultivated types derive from two progenitor species. Although cultivated pummelos represent selections from one progenitor species, Citrus maxima, cultivated Mandarins are introgressions of C. maxima into the ancestral Mandarin species Citrus reticulata. The most widely cultivated citrus, sweet orange, is the offspring of previously admixed individuals, but sour orange is an F1 hybrid of pure C. maxima and C. reticulata parents, thus implying that wild Mandarins were part of the early breeding germplasm. A Chinese wild 'Mandarin' diverges substantially from C. reticulata, thus suggesting the possibility of other unrecognized wild citrus species. Understanding citrus phylogeny through genome analysis clarifies taxonomic relationships and facilitates sequence-directed genetic improvement.

Yuanmei Zhang - One of the best experts on this subject based on the ideXlab platform.

  • phenolic compositions and antioxidant capacities of chinese wild Mandarin citrus reticulata blanco fruits
    Food Chemistry, 2014
    Co-Authors: Yuanmei Zhang, Yujing Sun, Yan Shen, Liping Qiao, Liezhou Zhong, Zhiqin Zhou
    Abstract:

    As one of the most important centres of origin for the genus Citrus L., China is rich in wild Mandarin germplasm. In this study, phenolic compounds in the peels of 14 wild Mandarin genotypes native to China were determined and their antioxidant capacities were evaluated using DPPH, FRAP, ABTS and ORAC methods. We found that Nieduyeju had the highest total phenol content (51.14 mg/g DW), and Wulongsuanju had the highest total flavonoid content (20.66 mg/g DW). Hesperidin, the dominant flavonoid, was observed to be highest in Guangxihongpisuanju (55.98 mg/g DW). Ferulic acid was the most abundant phenolic acid analyzed, and Nieduyeju (7780.17 μg/g DW) and Guangxihongpisuanju (13,607.19 μg/g DW) had the highest contents of extractable and bound phenolic acid, respectively. Antioxidant potency composite (APC) index showed obvious variations ranging from 58.84 to 98.89 in the studied wild Mandarins, among them, Nieduyeju had the highest APC index. Overall, Guangxihongpisuanju, Nieduyeju, Cupigoushigan and Daoxianyeju contained more phenolics and exhibited higher antioxidant capacities than the Mandarin cultivars Satsuma and Ponkan.

  • phenolic composition of chinese wild Mandarin citrus reticulata balnco pulps and their antioxidant properties
    Industrial Crops and Products, 2014
    Co-Authors: Yuanmei Zhang, Yujing Sun, Yan Shen, Zhiqin Zhou
    Abstract:

    Abstract As one of the most important centers of origin for the genus Citrus L., China is rich in wild Mandarin germplasm. In this study, phenolic compounds in the fruit pulps of 14 wild Mandarins ( Citrus reticulata Blanco.) native to China were determined and their antioxidant capacities were evaluated by the DPPH, FRAP, ABTS, and ORAC methods. We found that Nieduyeju had the highest total phenolic content (22.26 ± 0.64 mg/g DW), and Wangcangzhoupigan had the highest total flavonoid content (3.82 ± 0.19 mg/g, DW). Hesperidin was the dominant flavonoid, and Guangxihongpisuanju (22.13 ± 0.33 mg/g DW) was with the highest content of this flavonoid among the 14 samples studied. Ferulic acid was the most abundant phenolic acid, and Nieduyeju (2336.07 ± 145.66 μg/g, DW) was with the highest extractable ferulic acid, while Guangxihongpisuanju (170.28 ± 5.03 μg/g, DW) was with the highest bound ferulic acid. Additionally, the overall antioxidant potency composite (APC) index showed obvious variations in the citrus fruits examined (52.26–88.73). The wild citrus fruits Nieduyeju, Wangcangzhoupigan and Guangxihongpisuanju presented significantly higher APC indices than the Mandarin cultivars Satsuma and Ponkan ( p

Uffe Hellsten - One of the best experts on this subject based on the ideXlab platform.

  • complex history of admixture during citrus domestication revealed by genome analysis
    Nature Biotechnology, 2014
    Co-Authors: Albert G Wu, Simon Prochnik, Simone Scalabrin, Jerome Salse, Florent Murat, Xavier Perrier, Uffe Hellsten, Jerry Jenkins, Manuel Ruiz, Javier Terol
    Abstract:

    Author(s): Wu, G. Albert; Prochnik, Simon; Jenkins, Jerry; Salse, Jerome; Hellsten, Uffe; Murat, Florent; Perrier, Xavier; Ruiz, Manuel; Scalabrin, Simone; Terol, Javier; Takita, Marco Aurélio; Labadie, Karine; Poulain, Julie; Couloux, Arnaud; Jabbari, Kamel; Cattonaro, Federica; Fabbro, Cristian Del; Pinosio, Sara; Zuccolo, Andrea; Chapman, Jarrod; Grimwood, Jane; Tadeo, Francisco; Estornell, Leandro H.; Mu?oz-Sanz, Juan V.; Ibanez, Victoria; Herrero-Ortega, Amparo; Aleza, Pablo; Pérez, Julián Pérez; Ramon, Daniel; Brunel, Dominique; Luro, Francois; Chen, Chunxian; Farmerie, William G.; Desany, Brian; Kodira, Chinnappa; Mohiuddin, Mohammed; Harkins, Tim; Fredrikson, Karin; Burns, Paul; Lomsadze, Alexandre; Borodovsky, Mark; Reforgiato, Giuseppe; Freitas-Astua, Juliana; Quetier, Francis; Navarro, Luis; Roose, Mikeal; Wincker, Patrick; Schmutz, Jeremy; Morgante, Michele; Machado, Marcos Antonio; Talon, Manuel; Jaillon, Olivier; Ollitrault, Patrick; Gmitter, Frederick; Rokhsar, Daniel | Abstract: Although Citrus is the most globally significant tree fruit, its domestication history is poorlyunderstood. Cultivated citrus types are believed to comprise selections from and/or hybrids of several wild progenitor species, but the identities of these progenitors, and their contribution to modern cultivars, remain controversial. Here we report the genomes of a collection of Mandarins, pummelos, and oranges, including a high quality reference sequence from a haploid Clementine Mandarin. By comparative genome analysis we show that these cultivated types can be derived from two progenitor species. Cultivated pummelos represent selections from a single progenitor species C. maxima. Unexpectedly, however, we find that cultivated Mandarins are introgressions of C. maxima into a distinct second population that we identify with the ancestral wild Mandarin species C. reticulata. Sweet and sour oranges are found to be interspecific hybrids. Sweet orange, the most widely cultivated citrus, arose as the offspring of previously admixed individuals. In contrast, sour (or Seville) orange is an F1 hybrid of pure C. maxima and C. reticulata parents, implying that wild Mandarins were part of the early breeding germplasm.Surprisingly, we also find that a wild Chinese Mandarin from Mangshan, China showssubstantial sequence divergence from C. reticulata and appears to represent a distinct taxon.Understanding the relationships and phylogeny of cultivated citrus through genome analysis will clarify taxonomic relationships and enable previously inconceivable opportunities for sequence-directed genetic improvement.Citrus are widely consumed worldwide as juice or fresh fruit, providing important sources ofvitamin C and other health-promoting compounds. Global production in 2012 exceeded 86million metric tons, with an estimated value of US$9 billion (http://www.fas.usda.gov/psdonline/circulars/citrus.pdf). The very narrow genetic diversity of cultivated citrus makes it highly vulnerable to disease outbreaks, including citrus greening disease (also known as Huanglongbing) that is rapidly spreading throughout the world's major citrus producing regions1. Understanding the population genomics and domestication of citrus will enable strategies for improvements to citrus including resistance to greening and otherdiseases. The domestication and distribution of edible citrus types began several thousand years ago in Southeast Asia and spread globally following ancient land and sea routes. The lineages that gave rise to most modern cultivated varieties, however, are lost in undocumented antiquity, and their identities remain controversial2, 3. Several features of Citrus biology and cultivation make deciphering these origins difficult. Cultivated varieties are typically propagated clonally by grafting and through asexual seed production (apomixis via nucellar polyembryony) to maintain desirable combinations of traits (Fig. 1). Thus many important cultivar groups have characteristic basic genotypes that presumably arose through interspecific hybridization and/or successive introgressive hybridizations of wild ancestral species. These domestication events predated the global expansion of citrus cultivation by hundreds or perhaps thousands of years, with no record of the domestication process. Diversity within such groups arises through accumulated somatic mutations, generally without sexual recombination, either as limb sports on trees or variants among apomictic seedling progeny.Two wild species are believed to have contributed to domesticated pummelos, Mandarins and oranges. Based on morphology and genetic markers, pummelos have generally been identified with the wild species C. maxima (Burm.) Merrill that is indigenous to Southeast Asia. Although Mandarins are similarly widely identified with the species C. reticulata Blanco 4-6, wild populations of C. reticulata have not been definitively described. Various authors have taken dif

  • Sequencing of diverse Mandarin, pummelo and orange genomes reveals complex history of admixture during citrus domestication
    Nature Biotechnology, 2014
    Co-Authors: G. Albert Wu, Simon Prochnik, Simone Scalabrin, Jerome Salse, Florent Murat, Xavier Perrier, Uffe Hellsten, Jerry Jenkins, Manuel Ruiz, Javier Terol
    Abstract:

    Cultivated citrus are selections from, or hybrids of, wild progenitor species whose identities and contributions to citrus domestication remain controversial. Here we sequence and compare citrus genomes-a high-quality reference haploid clementine genome and Mandarin, pummelo, sweet-orange and sour-orange genomes-and show that cultivated types derive from two progenitor species. Although cultivated pummelos represent selections from one progenitor species, Citrus maxima, cultivated Mandarins are introgressions of C. maxima into the ancestral Mandarin species Citrus reticulata. The most widely cultivated citrus, sweet orange, is the offspring of previously admixed individuals, but sour orange is an F1 hybrid of pure C. maxima and C. reticulata parents, thus implying that wild Mandarins were part of the early breeding germplasm. A Chinese wild 'Mandarin' diverges substantially from C. reticulata, thus suggesting the possibility of other unrecognized wild citrus species. Understanding citrus phylogeny through genome analysis clarifies taxonomic relationships and facilitates sequence-directed genetic improvement.

Florent Murat - One of the best experts on this subject based on the ideXlab platform.

  • complex history of admixture during citrus domestication revealed by genome analysis
    Nature Biotechnology, 2014
    Co-Authors: Albert G Wu, Simon Prochnik, Simone Scalabrin, Jerome Salse, Florent Murat, Xavier Perrier, Uffe Hellsten, Jerry Jenkins, Manuel Ruiz, Javier Terol
    Abstract:

    Author(s): Wu, G. Albert; Prochnik, Simon; Jenkins, Jerry; Salse, Jerome; Hellsten, Uffe; Murat, Florent; Perrier, Xavier; Ruiz, Manuel; Scalabrin, Simone; Terol, Javier; Takita, Marco Aurélio; Labadie, Karine; Poulain, Julie; Couloux, Arnaud; Jabbari, Kamel; Cattonaro, Federica; Fabbro, Cristian Del; Pinosio, Sara; Zuccolo, Andrea; Chapman, Jarrod; Grimwood, Jane; Tadeo, Francisco; Estornell, Leandro H.; Mu?oz-Sanz, Juan V.; Ibanez, Victoria; Herrero-Ortega, Amparo; Aleza, Pablo; Pérez, Julián Pérez; Ramon, Daniel; Brunel, Dominique; Luro, Francois; Chen, Chunxian; Farmerie, William G.; Desany, Brian; Kodira, Chinnappa; Mohiuddin, Mohammed; Harkins, Tim; Fredrikson, Karin; Burns, Paul; Lomsadze, Alexandre; Borodovsky, Mark; Reforgiato, Giuseppe; Freitas-Astua, Juliana; Quetier, Francis; Navarro, Luis; Roose, Mikeal; Wincker, Patrick; Schmutz, Jeremy; Morgante, Michele; Machado, Marcos Antonio; Talon, Manuel; Jaillon, Olivier; Ollitrault, Patrick; Gmitter, Frederick; Rokhsar, Daniel | Abstract: Although Citrus is the most globally significant tree fruit, its domestication history is poorlyunderstood. Cultivated citrus types are believed to comprise selections from and/or hybrids of several wild progenitor species, but the identities of these progenitors, and their contribution to modern cultivars, remain controversial. Here we report the genomes of a collection of Mandarins, pummelos, and oranges, including a high quality reference sequence from a haploid Clementine Mandarin. By comparative genome analysis we show that these cultivated types can be derived from two progenitor species. Cultivated pummelos represent selections from a single progenitor species C. maxima. Unexpectedly, however, we find that cultivated Mandarins are introgressions of C. maxima into a distinct second population that we identify with the ancestral wild Mandarin species C. reticulata. Sweet and sour oranges are found to be interspecific hybrids. Sweet orange, the most widely cultivated citrus, arose as the offspring of previously admixed individuals. In contrast, sour (or Seville) orange is an F1 hybrid of pure C. maxima and C. reticulata parents, implying that wild Mandarins were part of the early breeding germplasm.Surprisingly, we also find that a wild Chinese Mandarin from Mangshan, China showssubstantial sequence divergence from C. reticulata and appears to represent a distinct taxon.Understanding the relationships and phylogeny of cultivated citrus through genome analysis will clarify taxonomic relationships and enable previously inconceivable opportunities for sequence-directed genetic improvement.Citrus are widely consumed worldwide as juice or fresh fruit, providing important sources ofvitamin C and other health-promoting compounds. Global production in 2012 exceeded 86million metric tons, with an estimated value of US$9 billion (http://www.fas.usda.gov/psdonline/circulars/citrus.pdf). The very narrow genetic diversity of cultivated citrus makes it highly vulnerable to disease outbreaks, including citrus greening disease (also known as Huanglongbing) that is rapidly spreading throughout the world's major citrus producing regions1. Understanding the population genomics and domestication of citrus will enable strategies for improvements to citrus including resistance to greening and otherdiseases. The domestication and distribution of edible citrus types began several thousand years ago in Southeast Asia and spread globally following ancient land and sea routes. The lineages that gave rise to most modern cultivated varieties, however, are lost in undocumented antiquity, and their identities remain controversial2, 3. Several features of Citrus biology and cultivation make deciphering these origins difficult. Cultivated varieties are typically propagated clonally by grafting and through asexual seed production (apomixis via nucellar polyembryony) to maintain desirable combinations of traits (Fig. 1). Thus many important cultivar groups have characteristic basic genotypes that presumably arose through interspecific hybridization and/or successive introgressive hybridizations of wild ancestral species. These domestication events predated the global expansion of citrus cultivation by hundreds or perhaps thousands of years, with no record of the domestication process. Diversity within such groups arises through accumulated somatic mutations, generally without sexual recombination, either as limb sports on trees or variants among apomictic seedling progeny.Two wild species are believed to have contributed to domesticated pummelos, Mandarins and oranges. Based on morphology and genetic markers, pummelos have generally been identified with the wild species C. maxima (Burm.) Merrill that is indigenous to Southeast Asia. Although Mandarins are similarly widely identified with the species C. reticulata Blanco 4-6, wild populations of C. reticulata have not been definitively described. Various authors have taken dif

  • Sequencing of diverse Mandarin, pummelo and orange genomes reveals complex history of admixture during citrus domestication
    Nature Biotechnology, 2014
    Co-Authors: G. Albert Wu, Simon Prochnik, Simone Scalabrin, Jerome Salse, Florent Murat, Xavier Perrier, Uffe Hellsten, Jerry Jenkins, Manuel Ruiz, Javier Terol
    Abstract:

    Cultivated citrus are selections from, or hybrids of, wild progenitor species whose identities and contributions to citrus domestication remain controversial. Here we sequence and compare citrus genomes-a high-quality reference haploid clementine genome and Mandarin, pummelo, sweet-orange and sour-orange genomes-and show that cultivated types derive from two progenitor species. Although cultivated pummelos represent selections from one progenitor species, Citrus maxima, cultivated Mandarins are introgressions of C. maxima into the ancestral Mandarin species Citrus reticulata. The most widely cultivated citrus, sweet orange, is the offspring of previously admixed individuals, but sour orange is an F1 hybrid of pure C. maxima and C. reticulata parents, thus implying that wild Mandarins were part of the early breeding germplasm. A Chinese wild 'Mandarin' diverges substantially from C. reticulata, thus suggesting the possibility of other unrecognized wild citrus species. Understanding citrus phylogeny through genome analysis clarifies taxonomic relationships and facilitates sequence-directed genetic improvement.