Genomic signatures of domestication and adaptation during geographical expansions of rice cultivation

• Published in: Plant biotechnology journal Vol. 20; no. 1; pp. 16 - 18
• Main Authors: Zheng, Xiaoming, Pang, Hongbo, Wang, Junrui, Yao, Xuefeng, Song, Yue, Li, Fei, Lou, Danjing, Ge, Jinyue, Zhao, Zongyao, Qiao, Weihua, Kim, Sung Ryul, Ye, Guoyou, Olsen, Kenneth M., Liu, ChunMing, Yang, Qingwen
• Format: Journal Article
• Language: English
• Published: England John Wiley & Sons, Inc 01.01.2022; John Wiley and Sons Inc
• Subjects: Acclimatization; Adaptation; Alleles; association; breeding; Brief Communication; Brief Communications; Chilling; Cold; Cold tolerance; Conflicts of interest; Cooling; Cultivation; Domestication; Drought; Gene frequency; Genes; Genetic modification; Genome, Plant - genetics; Genomics; Grain cultivation; Growth chambers; Haplotypes; Mutation; Oryza - genetics; Regions; Rice; Sensitivity; Subgroups; Survival; Temperature tolerance; Thermal stress; Water availability; Waterlogging; Asia; adaptation; association; cold tolerance; rice; breeding
• ISSN: 1467-7644; 1467-7652; 1467-7652
• DOI: 10.1111/pbi.13730

After domestication, the expansions of rice landraces into the present-day range required a diverse array of adaptations to local environments, which included changes in daylight sensitivity, expanded thermal tolerance (for excess cold and heat), adaptations to water availability (drought and waterlogging), and resistance to biotic stresses (Garris et al., 2005; Glaszmann, 1987). The colour shading scale indicates minimum temperature in May. (g) Chilling tolerance response of rice varieties with the two COLDF alleles. (h) The frequency of the two COLDF alleles in wild and cultivated rice subgroups. (i–j) Mutations in the COLDF genomic region for TILLING (coldf-1; i) and gene editing (coldf-2; j) mutants and showed increased chilling sensitivity. (k) The cold tolerance response and survival rate of 14 varieties with COLDFtej and 19 accessions with COLDF other. To address the function of the Haptej allele, we performed cold treatments on 14 cultivated rice varieties with the Haptej allele and 19 cultivated rice varieties with the Hapother allele in a growth chamber, and the results showed that under cold stress (4 °C for 48 h), the survival rate was higher in rice varieties with the Haptej allele (93.25%) than those with the Hapother allele (10.12%; P = 1.66 × 10−13, two-tailed t-test) (Figure 1g,h,k).