ゲノム解読で明らかになったコーヒーの太古の起源と気候変動下の未来(Newly sequenced genome reveals coffee’s prehistoric origin story — and its future under climate change)

ad

2024-04-15 バッファロー大学(UB)

コーヒー植物の耐候性を向上させるための鍵は、古代にあります。アラビカ種の最高品質のリファレンスゲノムを作成し、その起源に関する秘密を明らかにしました。約60万年前にエチオピアの森で、2つの他のコーヒー種の自然な交配によって発展したことがわかりました。アラビカの耐候性に関する理解を深め、気候変動に適応した新しい品種を育成するために、この成果は重要です。

<関連情報>

アラビカ種のゲノムと集団ゲノムから、現代コーヒー品種の多様化の歴史が明らかになった The genome and population genomics of allopolyploid Coffea arabica reveal the diversification history of modern coffee cultivars

Jarkko Salojärv,Aditi Rambani,Zhe Yu,Romain Guyot,Susan Strickler,Maud Lepelley,Cui Wang,Sitaram Rajaraman,Pasi Rastas,Chunfang Zheng,Daniella Santos Muñoz,João Meidanis,Alexandre Rossi Paschoal,Yves Bawin,Trevor J. Krabbenhoft,Zhen Qin Wang,Steven J. Fleck,Rudy Aussel,Laurence Bellanger,Aline Charpagne,Coralie Fournier,Mohamed Kassam,Gregory Lefebvre,Sylviane Métairon,… Patrick Descombes
Nature Genetics  Published:15 April 2024
DOI:https://doi.org/10.1038/s41588-024-01695-w

ゲノム解読で明らかになったコーヒーの太古の起源と気候変動下の未来(Newly sequenced genome reveals coffee’s prehistoric origin story — and its future under climate change)

Abstract

Coffea arabica, an allotetraploid hybrid of Coffea eugenioides and Coffea canephora, is the source of approximately 60% of coffee products worldwide, and its cultivated accessions have undergone several population bottlenecks. We present chromosome-level assemblies of a di-haploid C. arabica accession and modern representatives of its diploid progenitors, C. eugenioides and C. canephora. The three species exhibit largely conserved genome structures between diploid parents and descendant subgenomes, with no obvious global subgenome dominance. We find evidence for a founding polyploidy event 350,000–610,000 years ago, followed by several pre-domestication bottlenecks, resulting in narrow genetic variation. A split between wild accessions and cultivar progenitors occurred ~30.5 thousand years ago, followed by a period of migration between the two populations. Analysis of modern varieties, including lines historically introgressed with C. canephora, highlights their breeding histories and loci that may contribute to pathogen resistance, laying the groundwork for future genomics-based breeding of C. arabica.

生物環境工学
ad
ad
Follow
ad
タイトルとURLをコピーしました