Identification of QTL controlling volatile terpene contents in tea plant (Camellia sinensis) using a high-aroma ‘Huangdan’ x ‘Jinxuan’ F1 population

• DOI: 10.3389/fpls.2023.1130582
• Publication Date: 2023-03-29T05:55:35Z
• Authors: Si Chen; Xuanye Li; Yujie Liu; Jiedan Chen; Jianqiang Ma; Liang Chen
• Keywords: Terpene; Aroma of wine

Aroma is an important factor affecting the character and quality of tea. The improvement aroma trait a crucial research direction tea plant breeding. Volatile terpenes, as major contributors to floral odors products, also play critical roles in defense responses plants multiple stresses. However, previous studies have largely focused on formation during manufacture or comparison raw samples. mechanisms causing different profiles between cultivars remained underexplored. In current study, high-density genetic linkage map was constructed based F1 population 'Huangdan' × 'Jinxuan' using genotyping by sequencing. This covered 1754.57 cM contained 15 groups with low inter-marker distance 0.47 cM. A total 42 QTLs associated eight monoterpene contents 12 four sesquiterpenes were identified average PVE 12.6% 11.7% respectively. Furthermore, six candidate genes related volatile terpene found QTL cluster chromosome 5 RNA-seq analysis. work will enrich our understanding molecular mechanism biosynthesis provide theoretical basis for breeding programs improvement.