@article{fdi:010042684, title = {{C}haracterization of the major fragance gene from an aromatic japonica rice and analysis of its diversity in {A}sian cultivated rice}, author = {{B}ourgis, {F}abienne and {G}uyot, {R}omain and {G}herbi, {H}assen and {T}ailliez, {E}. and {A}mabile, {I}sabelle and {S}alse, {J}. and {L}orieux, {M}athias and {D}elseny, {M}. and {G}hesquiere, {A}lain}, editor = {}, language = {{ENG}}, abstract = {{I}n {A}sian cultivated rice ({O}ryza sativa {L}.), aroma is one of the most valuable traits in grain quality and 2-{ACP} is the main volatile compound contributing to the characteristic popcorn-like odour of aromatic rices. {A}lthough the major locus for grain fragrance (frg gene) has been described recently in {B}asmati rice, this gene has not been characterised in true japonica varieties and molecular information available on the genetic diversity and evolutionary origin of this gene among the different varieties is still limited. {H}ere we report on characterisation of the frg gene in the {A}zucena variety, one of the few aromatic japonica cultivars. {W}e used a {RIL} population from a cross between {A}zucena and {IR}64, a non-aromatic indica, the reference genomic sequence of {N}ipponbare (japonica) and 93-11 (indica) as well as an {A}zucena {BAC} library, to identify the major fragance gene in {A}zucena. {W}e thus identified a betaine aldehyde dehydrogenase gene, badh2, as the candidate locus responsible for aroma, which presented exactly the same mutation as that identified in {B}asmati and {J}asmine-like rices. {C}omparative genomic analyses showed very high sequence conservation between {A}zucena and {N}ipponbare {BADH}2, and a {MITE} was identified in the promotor region of the {BADH}2 allele in 93-11. {T}he badh2 mutation and {MITE} were surveyed in a representative rice collection, including traditional aromatic and non-aromatic rice varieties, and strongly suggested a monophylogenetic origin of this badh2 mutation in {A}sian cultivated rices. {A}ltogether these new data are discussed here in the light of current hypotheses on the origin of rice genetic diversity.}, keywords = {}, booktitle = {}, journal = {{T}heoretical and {A}pplied {G}enetics}, volume = {117}, numero = {3}, pages = {353--368}, ISSN = {0040-5752}, year = {2008}, DOI = {10.1007/s00122-008-0780-9}, URL = {https://www.documentation.ird.fr/hor/fdi:010042684}, }