Characterization of high-oleic peanut natural mutants derived from an intersectional cross
DOI:
https://doi.org/10.3989/gya.1070142Keywords:
Arachis, FAD2A, FAD2B, GC, High oleate, Intersectional hybrid, NIRAbstract
As compared with its normal oleate counterpart, high oleate peanuts have better storage quality and several health benefits, and are therefore preferred by peanut shellers and consumers. High oleate has now become one of the main breeding objectives of peanuts. Thus far, over 50 high oleate peanut cultivars have been registered. Yet high oleate peanut breeding relies heavily on a limited number of high oleate genotypes. In this paper, we reported, for the first time, high peanut oleate natural mutants with large seeds derived from an intersectional cross, which were identified with near infra-red spectroscopy and confirmed by gas chromatography. Sequencing of FAD2 from the high-oleic hybrids along with their normal oleate parents indicated that a 448G >A mutation in FAD2A coupled with a 441_442ins A or G in FAD2B together caused high oleate phenotypes in these peanut hybrids.
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