PMID- 34410124 OWN - NLM STAT- MEDLINE DCOM- 20210902 LR - 20210902 IS - 1520-5118 (Electronic) IS - 0021-8561 (Linking) VI - 69 IP - 34 DP - 2021 Sep 1 TI - Primary Bitter Taste of Citrus is Linked to a Functional Allele of the 1,2-Rhamnosyltransferase Gene Originating from Citrus grandis. PG - 9869-9882 LID - 10.1021/acs.jafc.1c01211 [doi] AB - 1,2-Rhamnosyltransferase (1,2RhaT) catalyzes the final step of production of flavanone neohesperidoside (FNH) that is responsible for the primary bitter taste of citrus fruits. In this study, species-specific flavonoid profiles were determined in 87 Citrus accessions by identifying eight main flavanone glycosides (FGs). Accumulation of FNHs was completely correlated to the presence of the 1,2RhaT gene in 87 citrus accessions analyzed using a novel 1,2RhaT-specific DNA marker. Pummelo (Citrus grandis) was identified as the genetic origin for a function allele of 1,2RhaT that underpinned FNH-bitterness in modern citrus cultivars. In addition, genes encoding six MYB and five bHLH transcription factors were shown to coexpress with 1,2RhaT and other flavonoid pathway genes related to FNH accumulation, indicating that these transcription factors may affect the fruit taste of citrus. This study provides a better understanding of bitterness formation in Citrus varieties and a genetic marker for the early selection of nonbitterness lines in citrus breeding programs. FAU - Chen, Jiajing AU - Chen J AD - Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, P. R. China. FAU - Li, Gu AU - Li G AD - Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, P. R. China. FAU - Zhang, Haipeng AU - Zhang H AD - Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, P. R. China. FAU - Yuan, Ziyu AU - Yuan Z AD - Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, P. R. China. FAU - Li, Wenyun AU - Li W AD - Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, P. R. China. FAU - Peng, Zhaoxin AU - Peng Z AD - Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, P. R. China. FAU - Shi, Meiyan AU - Shi M AD - Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, P. R. China. FAU - Ding, Wenyu AU - Ding W AD - Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, P. R. China. FAU - Zhang, Huixian AU - Zhang H AD - Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, P. R. China. FAU - Cheng, Yunjiang AU - Cheng Y AD - Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, P. R. China. FAU - Yao, Jia-Long AU - Yao JL AD - The New Zealand Institute for Plant & Food Research Limited, Private Bag 92169, Auckland 1142, New Zealand. FAU - Xu, Juan AU - Xu J AUID- ORCID: 0000-0003-4623-9343 AD - Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry, Huazhong Agricultural University, Wuhan 430070, P. R. China. LA - eng PT - Journal Article DEP - 20210819 PL - United States TA - J Agric Food Chem JT - Journal of agricultural and food chemistry JID - 0374755 RN - 0 (Flavonoids) SB - IM MH - Alleles MH - *Citrus/genetics MH - Flavonoids MH - Plant Breeding MH - Taste OTO - NOTNLM OT - citrus OT - flavanone glycoside OT - flavonoid OT - neohesperidoside OT - rutinoside OT - transcription factors EDAT- 2021/08/20 06:00 MHDA- 2021/09/03 06:00 CRDT- 2021/08/19 12:12 PHST- 2021/08/20 06:00 [pubmed] PHST- 2021/09/03 06:00 [medline] PHST- 2021/08/19 12:12 [entrez] AID - 10.1021/acs.jafc.1c01211 [doi] PST - ppublish SO - J Agric Food Chem. 2021 Sep 1;69(34):9869-9882. doi: 10.1021/acs.jafc.1c01211. Epub 2021 Aug 19.