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. 2017 Oct 17;12(10):e0186113.
doi: 10.1371/journal.pone.0186113. eCollection 2017.

Mapping of important taxonomic and productivity traits using genic and non-genic transposable element markers in peanut (Arachis hypogaea L.)

Anil A Hake  1 , Kenta Shirasawa  2 , Arati Yadawad  1 , M Sukruth  1 , Malagouda Patil  1 , Spurthi N Nayak  1 , S Lingaraju  3 , P V Patil  3 , H L Nadaf  1 , M V C Gowda  4 , R S Bhat  1
Affiliations

Mapping of important taxonomic and productivity traits using genic and non-genic transposable element markers in peanut (Arachis hypogaea L.)

Anil A Hake et al. PLoS One. .

Abstract

A mapping population of recombinant inbred lines (RILs) derived from TMV 2 and its mutant, TMV 2-NLM was employed for mapping important taxonomic and productivity traits using genic and non-genic transposable element markers in peanut. Single nucleotide polymorphism and copy number variation using RAD-Sequencing data indicated very limited polymorphism between TMV 2 and TMV 2-NLM. But phenotypically they differed significantly for many taxonomic and productivity traits. Also, the RIL population showed significant variation for a few additional agronomic traits. A genetic linkage map of 1,205.66 cM was constructed using 91 genic and non-genic Arachis hypogaea transposable element (AhTE) markers. Using single marker analysis and QTL analysis, the markers with high phenotypic variance explained (PVE) were identified for branching pattern (32.3%), number of primary and secondary branches (19.9% and 28.4%, respectively), protein content (26.4%), days to 50% flowering (22.0%), content of oleic acid (15.1%), test weight (13.6%) and pod width (12.0%). Three genic markers (AhTE0357, AhTE0391, AhTE0025) with Arachis hypogaea miniature inverted-repeat transposable element (AhMITE1) activity in the genes Araip.TG1BL (B02 chromosome), Aradu.7N61X (A09 chromosome) and Aradu.7065G (A07 chromosome), respectively showed strong linkage with these taxonomic, productivity and quality traits. Since TMV 2 and TMV 2-NLM differed subtly at DNA level, the background noise in detecting the marker-trait associations was minimum; therefore, the markers identified in this study for the taxonomic and productivity traits may be significant and useful in peanut molecular breeding.

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Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Fig 1
Fig 1. TMV 2 (left) and its mutant TMV 2-NLM (right).
Fig 2
Fig 2. Copy number variation in TMV 2-NLM when compared to TMV 2.
Fig 3
Fig 3
Frequency distribution of RILs of TMV 2 × TMV 2-NLM for days to 50% flowering (a) and oleic acid (b).
Fig 4
Fig 4. Insertion of AhMITE1 in the intronic region of the gene Aradu.7N61X.
Fig 5
Fig 5. QTL map for agronomic, productivity and nutritional traits from the RILs of TMV 2 × TMV 2-NLM.
See this image and copyright information in PMC

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