Coconut genome assembly enables evolutionary analysis of palms and highlights signaling pathways involved in salt tolerance.

摘要: Coconut (Cocos nucifera) is the emblematic palm of tropical coastal areas all around globe. It provides vital resources to millions farmers. In an effort better understand its evolutionary history and develop genomic tools for improvement, a sequence draft was recently released. Here, we present dense linkage map (8402 SNPs) aiming assemble large genome coconut (2.42 Gbp, 2n = 32) into 16 pseudomolecules. As result, 47% sequences (representing 77% genes) were assigned groups ordered. We observed segregation distortion in chromosome Cn15, which is a signature strong selection among pollen grains, favouring maternal allele. Comparing our results with oil Elaeis guineensis allowed us identify major events palms. find that underwent massive transposable element invasion last million years, could be related fluctuations sea level during glaciations at Pleistocene would have triggered population bottleneck. Finally, facultative halophyte trait coconut, conducted RNA-seq experiment on leaves key players signaling pathways involved salt stress response. Altogether, findings represent valuable resource breeding community. Yaodong Yang et al. report chromosome-scale assembly transcriptome analysis leaves. Their reveals important steps along trajectory palms identifies genes may play role tolerance stress.