作物学报 ›› 2026, Vol. 52 ›› Issue (6): 1646-1657.doi: 10.3724/SP.J.1006.2026.55071
郑玉珍1,2(
), 齐飞艳2,3, 孙子淇2,3, 刘华2, 秦利2, 石磊2, 王娟2, 汪蒙蒙2, 韩锁义2, 徐静2, 苗利娟2, 黄冰艳2, 董文召2, 郑峥2, 张新友1,2,3,*(
)
Zheng Yu-Zhen1,2(
), Qi Fei-Yan2,3, Sun Zi-Qi2,3, Liu Hua2, Qin Li2, Shi Lei2, Wang Juan2, Wang Meng-Meng2, Han Suo-Yi2, Xu Jing2, Miao Li-Juan2, Huang Bing-Yan2, Dong Wen-Zhao2, Zheng Zheng2, Zhang Xin-You1,2,3,*(
)
摘要:
花生油的品质主要由其脂肪酸组分决定, 因此改良花生的脂肪酸组分已成为花生育种的关键目标之一。本研究以冀花甜1号和PI478819为亲本构建的RIL群体为材料, 采用BSA-seq与传统定位相结合的方法, 对2个环境中花生籽仁的总超长链脂肪酸(TVLCFAs)和7种脂肪酸组分进行QTL定位, 基于检测到的主效QTL, 开发了相应的KASP标记, 并在RIL群体中进行验证及评价。共定位到7个与TVLCFAs和7种脂肪酸组分相关的QTL, 其中3个QTLs (qA06.1、qA08.1和qA16.1)与TVLCFAs和山嵛酸含量共定位且在2个环境中被重复检测到, 表型变异解释率为7.10%~32.85%。此外, 在2个环境中均检测到与油酸、亚油酸和棕榈酸含量相关的qA08.1, 表型变异解释率为13.73%~29.33%。针对3个主效QTLs开发的分子标记Tif2.A06.115805462、Tif2.A08.45741511和Tif2.A16.148167815能有效鉴别TVLCFAs、花生酸和山嵛酸含量存在差异的材料, 且Tif2.A08.45741511还与油酸、亚油酸和棕榈酸含量密切相关。本研究为低TVLCFAs和高油酸分子育种提供了宝贵的遗传资源, 并有助于加快低TVLCFAs和高油酸等优质专用型花生的分子标记辅助选择育种。
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