Domestication of a new crop requires identification and improvement of desirable characteristics Field cress (Lepidium campestre) is being domesticated as a new oilseed crop, particularly for northern temperate regions.. In the present study, an F2 mapping population and its F3 progenies were used to identify quantitative trait loci (QTLs) for plant height (PH), number of stems per plant (NS), stem growth orientation (SO), flowering habit (FH), earliness (ER), seed yield per plant (SY), pod shattering resistance (SHR), and perenniality (PE). A highly significant correlation (p < 0.001) was observed between several pairs of characteristics, including SY and ER (negative) or ER and PE (positive). The inclusive composite interval mapping approach was used for QTL mapping using 2330 single nucleotide polymorphism (SNP) markers mapped across the eight field cress linkage groups. Nine QTLs were identified with NS, PH, SO, and PE having 3, 3, 2, and 1 QTLs, explaining 21.3%, 29.5%, 3.8%, and 7.2% of the phenotypic variation, respectively. Candidate genes behind three of the QTLs and favorable marker alleles for different classes of each characteristic were identified. Following their validation through further study, the identified QTLs and associated favorable marker alleles can be used in marker-aided breeding to speed up the domestication of field cress.

中文翻译：

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田间水芹（Lepidium campestre）驯化相关特征的QTL定位——亚北极地区一种新型油料作物

新作物的驯化需要识别和改进理想的特性 油菜（Lepidium campestre）正在作为一种新的油籽作物被驯化，特别是在北温带地区。在本研究中，F2 绘图种群及其 F3 后代被用于确定植物高度 (PH)、每株茎数 (NS)、茎生长方向 (SO)、开花习性 (FH)、早熟 (ER)、每株种子产量 (SY)、豆荚的数量性状基因座 (QTL)抗破碎性 (SHR) 和多年生性 (PE)。在几对特征之间观察到高度显着的相关性（p < 0.001），包括 SY 和 ER（阴性）或 ER 和 PE（阳性）。包容性复合区间作图方法用于 QTL 作图，使用 2330 个单核苷酸多态性 (SNP) 标记在八个油菜连锁群中作图。NS、PH、SO 和 PE 鉴定出 9 个 QTL，分别具有 3、3、2 和 1 个 QTL，分别解释了 21.3%、29.5%、3.8% 和 7.2% 的表型变异。确定了三个 QTL 背后的候选基因和每个特征的不同类别的有利标记等位基因。通过进一步研究验证后，鉴定出的QTLs和相关的有利标记等位基因可用于标记辅助育种，以加快水芹的驯化。确定了三个 QTL 背后的候选基因和每个特征的不同类别的有利标记等位基因。通过进一步研究验证后，鉴定出的QTLs和相关的有利标记等位基因可用于标记辅助育种，以加快水芹的驯化。确定了三个 QTL 背后的候选基因和每个特征的不同类别的有利标记等位基因。通过进一步研究验证后，鉴定出的QTLs和相关的有利标记等位基因可用于标记辅助育种，以加快水芹的驯化。