| 赵利,赵玮,李闻娟,王利民,党照.不同环境下胡麻脂肪酸含量的遗传分析[J].干旱地区农业研究,2018,36(6):48~55 |
| 不同环境下胡麻脂肪酸含量的遗传分析 |
| Genetic analysis of fatty acid contents in flax (Linum usitatissimum L.) grown under different environmental conditions |
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| DOI：10.7606/j.issn.1000-7601.2018.06.08 |
| 中文关键词: 胡麻 脂肪酸 主基因＋多基因遗传模型 环境变化 遗传分析 |
| 英文关键词:flax fatty acids major gene plus polygene inheritance models environmental effects genetic analysis |
| 基金项目:国家自然科学基金项目“油用亚麻遗传图谱构建及亚麻酸含量的QTL定位研究”（31160291），“国家特色油料产业技术体系”（CARS-14） |
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| 中文摘要: |
| 为了解胡麻脂肪酸含量的遗传方式，采用气象色谱仪测定了甘肃定西、宁夏固原和河北张家口3个环境下的胡麻亲本DYM与STS及其衍生的233个重组自交系群体（(F6∶7)）的脂肪酸含量，运用数量性状主基因+多基因混合遗传模型对三个不同地点的胡麻脂肪酸含量进行了遗传分析。试验结果表明：（1）甘肃定西地区棕榈酸、油酸和亚麻酸含量均为1对主基因+多基因模型，硬脂酸和亚油酸含量均为4对主基因模型；（2）宁夏固原地区棕榈酸含量为多基因模型，硬脂酸和亚麻酸含量均为4对主基因模型，油酸含量为3对主基因模型，亚油酸含量为3对主基因+多基因模型；（3）河北张家口地区棕榈酸、硬脂酸和亚麻酸含量均为无主基因模型，油酸含量为多基因模型，亚油酸含量为4对主基因模型。相关分析表明，亚麻酸与棕榈酸、硬脂酸、油酸和亚油酸均呈（极）显著负相关，硬脂酸与油酸呈（极）显著正相关。因此在选育高亚麻酸含量等优质专用品种时，除注重主基因的作用外，还要注重环境的变化对α-亚麻酸含量的影响。 |
| 英文摘要: |
| To reveal the genetic mechanism of fatty acid content in flax seed, 233 recombinant inbred lines(RILs) derived from DYM×STS (F6∶7) along with their P1 and P2 were planted in 3 environment conditions, i.e. Dingxi，Gansu Province; Guyuan, Ningxia Hui Autonomous Region, and Zhangjiakou, Hebei Province, respectively. Fatty acid contents were analyzed with a gas chromatograph. Mixed major gene plus polygene inheritance model was used to analyze the P1, P2, and RILs. The results showed that: (1) In the samples from Dingxi, Gansu Privence, palmitic acid, oleic acid, and linolenic acid contents were with a model of 1 major gene plus polygene and stearic acid and linoleic acid were with 4 major genes inheritance models; (2) In the samples from Guyuan, Ningxia Hui Autonomous Region, palmitic acid content was with polygene inheritance model, stearic acid and linolenic acid were with 4 major genes inheritance models, oleic acid content was with 3 major genes inheritance models, and linoleic acid content was with 3 major genes plus polygene inheritance models; (3) In the samples from Zhangjiakou, Hebei Province, palmitic acid，stearic acid, and linolenic acid contents were without major genes inheritance models, oleic acid content was with polygene inheritance models, and linoleic acid content was with 4 major genes inheritance models. Correlation analysis showed that linolenic acid content had highly negatively significant correlation with palmitic acid, stearic acid, oleic acid, and linolenic acid contents while stearic acid had highly significant correlation with oleic acid content. Therefore, high linolenic acid and other special fatty acids breeding should also consider the effect of the growing environment change on α-linolenic acid content beside of genetic factors. |
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