@article{fdi:010077878,
  title = {{C}haracterization of new races of {X}anthomonas oryzae pv. oryzae in {M}ali informs resistance gene deployment},
  author = {{T}ekete, {C}. and {C}unnac, {S}{\'e}bastien and {D}oucour{\'e}, {H}. and {D}embele, {M}. and {K}eita, {I}. and {S}arra, {S}. and {D}agno, {K}. and {K}oita, {O}. and {V}erdier, {V}al{\'e}rie},
  editor = {},
  language = {{ENG}},
  abstract = {{B}acterial leaf blight caused by {X}anthomonas oryzae pv. oryzae represents a severe threat to rice cultivation in {M}ali. {C}haracterizing the pathotypic diversity of bacterial populations is key to the management of pathogen-resistant varieties. {F}orty-one {X}. oryzae pv. oryzae isolates were collected between 2010 and 2013 in the major rice growing regions in {M}ali. {A}ll isolates were virulent on the susceptible rice variety {A}zucena; evaluation of the isolates on 12 near isogenic rice lines, each carrying a single resistance gene, identified six new races ({A}4 to {A}9) and confirmed race {A}3 that was previously reported in {M}ali. {R}aces {A}5 and {A}6, isolated in {O}ffice du {N}iger and {S}elingue, were the most prevalent races in {M}ali. {R}ace {A}9 was the most virulent, circumventing all of the resistance genes tested. {X}a3 controlled six of seven races (i.e., 89% of the isolates tested). {T}he expansion of race {A}9 represents a major risk to rice cultivation and highlights the urgent need to identify a local source of resistance. {W}e selected 14 isolates of {X}. oryzae pv. oryzae representative of the most prevalent races to evaluate 29 rice varieties grown by farmers in {M}ali. {S}ix isolates showed a high level of resistance to {X}. oryzae pv. oryzae and were then screened with a larger collection of isolates. {B}ased on the interactions among the six varieties and the {X}. oryzae pv. oryzae isolates, we characterized eight different pathotypes ({P}1 to {P}8). {T}wo rice varieties, {SK}20-28 and {G}igante, effectively controlled all of the isolates tested. {T}he low association observed among races and pathotypes of {X}. oryzae pv. oryzae suggests that the resistance observed in the local rice varieties does not simply rely on single known {X}a genes. {X}. oryzae pv. oryzae is pathogenically and geographically diverse. {B}oth the races of {X}. oryzae pv. oryzae characterized in this study and the identification of sources of resistance in local rice varieties provide useful information to inform the design of effective breeding programs for resistance to bacterial leaf blight in {M}ali.},
  keywords = {bacterial leaf blight ; {M}ali ; pathotype ; race ; resistance ; rice ; {X}anthomonas oryzae pv. oryzae ; {MALI}},
  booktitle = {},
  journal = {{P}hytopathology},
  volume = {110},
  numero = {2},
  pages = {267--277},
  ISSN = {0031-949{X}},
  year = {2020},
  DOI = {10.1094/phyto-02-19-0070-r},
  URL = {https://www.documentation.ird.fr/hor/fdi:010077878},
}