Development and application of KASP marker for high throughput detection of AhFAD2 mutation in peanut

作者：Zhao, Shuzhen; Li, Aiqin; Li, Changsheng; Xia, Han; Zhao, Chuanzhi; Zhang, Ye; Hou, Lei; Wang, Xingjun^*

来源：Electronic Journal of Biotechnology, 2017, 25: 9-12.

DOI：10.1016/j.ejbt.2016.10.010

• Arachis hypogaea
• Fatty acid desaturase
• High oleic acid
• Kompetitive allele specific PCR
• Linoleic acid
• Marker assisted selection
• Molecular breeding
• Mutation in peanut
• Nucleotide substitution
• Oilseed crop
• Peanut oil

Background: Cultivated peanut (Arachis hypogaea L.) is a major oilseed cropworldwide. Fatty acid composition of peanut oil may affect the flavor and shelf life of the resulting food products. Oleic acid and linoleic acid are the major fatty acids of peanut oil. The conversion from oleic acid to linoleic acid is controlled by the Delta 12 fatty acid desaturase (FAD) encoded by AhFAD2A and AhFAD2B, two homoeologous genes from A and B subgenomes, respectively. One nucleotide substitution (G:C. A:T) of AhFAD2A and an "A" insertion of AhFAD2B resulted in high-oleic acid phenotype. Detection of AhFAD2 mutation had been achieved by cleaved amplified polymorphic sequence (CAPS), real-time polymerase chain reaction (qRT-PCR) and allele-specific PCR (AS-PCR). However, a low cost, high throughput and high specific method is still required to detect AhFAD2 genotype of large number of seeds. Kompetitive allele specific PCR (KASP) can detect both alleles in a single reaction. The aim of this work is to develop KASP for detection AhFAD2 genotype of large number of breeding materials. @@@ Results: Here, we developed a KASP method to detect the genotypes of progenies between high oleic acid peanut and common peanut. Validation was carried out by CAPS analysis. The results from KASP assay and CAPS analysis were consistent. The genotype of 18 out of 179 BC4F2 seeds was aabb. @@@ Conclusions: Due to high accuracy, time saving, high throughput feature and low cost, KASP is more suitable for determining AhFAD2 genotype than other methods.

• 出版日期2017-1-15
• 单位山东省农业科学院