@article{PAR00000188,
  title = {{C}an near-infrared reflectance of green coffee be used to detect introgression in {C}offea arabica cultivars?},
  author = {{B}ertrand, {B}. and {E}tienne, {H}. and {L}ashermes, {P}. and {G}uyot, {B}. and {D}avrieux, {F}.},
  editor = {},
  language = {{ENG}},
  abstract = {{M}ost new coffee cultivars disseminated over the last 1 {S} years are derived from the {T}imor {H}ybrid ({C}offea arabica x {C} canephora). {I}ntrogression of genes from the {C} canephora genome has been estimated at between 9 and 29% of the genome. {I}t has been shown that introgression can have a negative impact on the cup quality of cultivars derived from the {T}imor {H}ybrid. {C}onsequently, coffee buyers or roasters may wish to assess whether the coffee they are purchasing comes from introgressed varieties. {T}he possibility of distinguishing between non-introgressed {A}rabicas and genotypes carrying chromosome fragments introgressed from {C} canephora was investigated (i) using some classical chemical compounds (caffeine, chlorogenic acids, trigonelline, fat and sucrose) and (ii) using a new approach based on spectra acquired by near-infrared reflectance of green coffee. {N}ear-infrared spectra were obtained for 129 samples from two collections ({N}icaragua and {C}osta {R}ica) of introgressed and non-introgressed coffee trees. {T}he spectral collections were treated by principal component and factorial discrimination. {W}hen the introgressed coffee trees were compared with the non-introgressed trees using the chemical compounds, small but significant differences were found in caffeine, trigonelline and chlorogenic acid contents. {H}owever, the small variations in those compounds are not enough to detect introgression. {T}he spectral collections treated by principal component and factorial discrimination made it possible to class from 92.30 to 94.87% of the analysed samples correctly, while the percentages of correctly classified samples in the verification file varied from 88.23 to 94.11%. {T}he {NIRS} method appears to be an efficient method for determining whether a green coffee comes from an introgressed variety. (c) 2005 {S}ociety of {C}hemical {I}ndustry.},
  keywords = {{C}offea arabica ; {C}offea canephora ; introgression ; chemical contents ; {AFLP} ; {NIRS}},
  booktitle = {},
  journal = {{J}ournal of the {S}cience of {F}ood and {A}griculture},
  volume = {85},
  numero = {6},
  pages = {955--962},
  ISSN = {0022-5142},
  year = {2005},
  DOI = {10.1002/jsfa.2049},
  URL = {https://www.documentation.ird.fr/hor/{PAR}00000188},
}