Search Results

12 results

  1. CORESTA Meeting, Agronomy/Phytopathology, 2019, Victoria Falls, AP 35

    Genetic mapping and characterization of the pale yellow (Py) locus responsible for accelerated senescence in dark tobacco

    PRAMOD S.; ADAMS A.; DAVIS G.; LUSSO M.; FREDERICK J.; XU D.
    Altria Client Services LLC, Product Design & Maintenance, Richmond, VA, U.S.A.
    In commercial dark tobacco varieties (Nicotiana tabacum L.), accelerated senescence trait not only helps reduce TSNAs that are otherwise accumulated during the yellowing process associated with traditional dark varieties but also, could benefit...
  2. CORESTA Congress, Kunming, 2018, Agronomy/Phytopathology Groups, AP 31

    Genetic strategy for reducing sucker pressure in tobacco

    SHEN Yanxin; YANG J.; KUDITHIPUDI C.; XU Dongmei; FREDERICK J.; WAREK U.; STRICKLAND J.A.
    Altria Client Services LLC, Research, Development & Regulatory Affairs, Richmond, VA, U.S.A.
    Tobacco plants exhibit strong apical dominance because molecular signals from the shoot apical meristem (SAM) mediate hormonal regulation effectively inhibiting axillary bud growth. Upon SAM removal, however, hormonal signals are lost enabling...
  3. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 10

    Genetic strategies for sucker control and evaluation

    SHEN Y.; YANG J.; KUDITHIPUDI C.; XU D.; FREDERICK J.; WAREK U.; STRICKLAND J.A.
    Altria Client Services LLC, Research, Development and Regulatory Affairs, Richmond, VA, U.S.A.
    Tobacco plants exhibit strong apical dominance. Molecular signals from shoot apical meristems (SAM) mediate hormonal signals that effectively inhibit axillary bud growth. Upon SAM removal, loss of hormonal signals enables axillary buds to grow into...
  4. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 26

    Combining gene expression, metabolomics, and conventional breeding to increase the nitrogen use efficiency of Burley tobacco

    KUDITHIPUDI C.; FREDERICK J.; XU D.; ADAMS A.; PRAMOD S.; WAREK U.; STRICKLAND J.A.
    Altria Client Services LLC, Research, Development and Regulatory Affairs, Richmond, VA, U.S.A.
    High rates of nitrogen fertilization are required currently for cultivation of Burley tobacco to achieve the desired leaf yields and qualities. However, Maryland type tobaccos are grown using a nitrogen fertilization rate that is ~60-70 % lower than...
  5. CORESTA Congress, Berlin, 2016, Agronomy/Phytopathology Groups, AP 16

    Role of polyamines in leaf ripening of low alkaloid tobacco varieties

    NÖLKE G.(1); VOLKE D.(1); CHUDOBOVA I.(1); HOUDELET M.(1); LUSSO M.(2); FREDERICK J.(2); WAREK U.(2); STRICKLAND J.(2); XU D.(2); FISCHER R.(1); SCHINKEL H.(1); SCHILLBERG S.(1)
    (1) Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Aachen, Germany; (2) Altria Client Services LLC, Research, Development and Regulatory Affairs, Richmond, VA, U.S.A.
    Traditional breeding and molecular approaches have been used to develop tobacco varieties with reduced nicotine and secondary alkaloid levels. However, low-alkaloid (LA) tobacco varieties often show impaired leaf ripening and senescence leading to...
  6. CORESTA Congress, Berlin, 2016, Agronomy/Phytopathology Groups, AP 18

    Reduction of nicotine content in tobacco leaves by modification of transporter gene expression

    FREDERICK J.; XU D.; DAVIS G.A.; LION K.; WAREK U.; STRICKLAND J.
    Altria Client Services LLC, Research, Development and Regulatory Affairs, Richmond, VA, U.S.A.
    Current tobacco lines with reduced nicotine content derived from nic1nic2 mutants have inferior leaf quality and undesirable smoking characteristics possibly due to the metabolic consequences of blocked nicotine biosynthesis. Allowing root production...
  7. CORESTA Congress, Berlin, 2016, Agronomy/Phytopathology Groups, AP 23

    Tobacco genome sequence and its applications to genome-based selection

    XU D.; FREDERICK J.; ADAMS A.; PRAMOD S.; KUDITHIPUDI C.; SHEN Y.; LUSSO M.; WAREK U.; STRICKLAND J.
    Altria Client Services LLC, Research, Development and Regulatory Affairs, Richmond, VA, U.S.A.
    Tobacco (Nicotiana tabacum L.), a model organism for research, is also an economically important crop. Tobacco is an allotetraploid derived from interspecific hybridization involving the two diploid species Nicotiana sylvestris and Nicotiana...
  8. CORESTA Congress, Berlin, 2016, Agronomy/Phytopathology Groups, AP 24

    Characterization of nitrogen use efficient tobacco for molecular marker development

    FREDERICK J.; KUDITHIPUDI C.; XU D.; WAREK U.; STRICKLAND J.
    Altria Client Services LLC, Research, Development and Regulatory Affairs, Richmond, VA, U.S.A.
    High rates of nitrogen fertilization are required currently for cultivation of Burley tobacco to achieve yields and qualities that are desired. However, Maryland type tobaccos are grown using a nitrogen fertilization rate that is ~60-70% lower than...