Xiaoyun, a model accession for functional genomics research in Brassica napus.
Xiaoyun, a model accession for functional genomics research in Brassica napus.
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DOI：
10.1016/j.xplc.2023.100727
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发表时间：
2024-01-08
影响因子：
10.5
通讯作者：
Hong, Dengfeng
中科院分区：
文献类型：
--
作者：
Wang, Pengfei;Song, Yixian;Xie, Zhaoqi;Wan, Ming;Xia, Rui;Jiao, Yushun;Zhang, Hui;Yang, Guangsheng;Fan, Zhixiong;Yang, Qing-Yong;Hong, Dengfeng
Rapeseed (Brassica napus) provides quality edible plant oil and industrial raw materials, as well as protein-rich animal feed; however, molecular characterization of functional genes in rapeseed remains challenging, largely owing to its complex polyploid genome, relatively long generation time, and environmentally sensitive traits. To accelerate functional genomics research on rapeseed, especially in an artificially controlled, stable environment like that of comprehensive speed breeding (CSB; Song et al., 2022), we screened out the representative B. napus accession Xiaoyun (小芸), with a rapid cycling time and scaleddown but normal plant architecture.Xiaoyun displays an early flowering time in the CSB environment; it generally exposes its tiny flower buds at 18 days after germination (DAG), enters the anthesis stage at 22 DAG, finishes flowering at 35 DAG (when several terminal buds are removed to guarantee synchronous maturation), and matures at 57 DAG (Figure 1 A). Thus, about 6.5 generations of Xiaoyun can be cycled in 1 year; by contrast, the widely used genotype Westar completes its life cycle at 67 DAG, 10 days later than Xiaoyun (Song et al., 2022). As an elite parental line for true breeding, Xiaoyun also has a short growth cycle in the field, entering the flowering stage at 126 days after sowing (DAS, 29/10/2019–4/3/2020) in a winter environment (Jiangling, Hubei, 30 205500N, 112 2602800E) and 50 DAS (22/5/2020–8/7/2020) in a spring environment (Minle, Gansu, 38 2804800N, 100 50 0 39 00 E). Xiaoyun displays a compact plant architecture in the CSB environment; it typically generates one main inflorescence and three branches, with a plant height of 61.5±3.8 cm and a first-branch height of approximately 6.7 cm, and it produces more than 60 flower buds per plant, the first 50 of which are typically retained to guarantee the synchronized maturation of about 1200 seeds (Figure 1 A, Supplemental Table 1). Notably, Xiaoyun has robust phenotypes of leaves, floral organs, siliques, seeds, and so on throughout the process of growth and development (Figures 1 A–F, Supplemental Table 1). Hence, the indoor performance of Xiaoyun is favorable for phenotype identification as a model rapeseed genotype.
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