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Quantitative trait locus analysis and construction of consensus genetic map for foliar disease resistance based on two recombinant inbred line populations in cultivated groundnut (Arachis hypogaea L.)

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Relation http://oar.icrisat.org/4277/
http://dx.doi.org/10.1007/s11032-011-9661-z
 
Title Quantitative trait locus analysis and construction of consensus genetic map for foliar disease resistance based on two recombinant inbred line populations in cultivated groundnut (Arachis hypogaea L.)
 
Creator Sujay, V
Gowda, M V C
Pandey, M K
Bhat, R S
Khedikar, Y P
Nadaf, H L
Gautami, B
Sarvamangala, C
Lingaraju, S
Radhakrishan, T
Knapp, S J
Varshney, R K
 
Subject Groundnut
 
Description Late leaf spot (LLS) and rust have the
greatest impact on yield losses worldwide in groundnut
(Arachis hypogaea L.). With the objective of
identifying tightly linked markers to these diseases, a
total of 3,097 simple sequence repeats (SSRs) were
screened on the parents of two recombinant inbred line
(RIL) populations, namely TAG 24 9 GPBD 4 (RIL-
4) and TG 26 9 GPBD 4 (RIL-5), and segregation
data were obtained for 209 marker loci for each of the
mapping populations. Linkage map analysis of the 209
loci resulted in the mapping of 188 and 181 loci in
RIL-4 and RIL-5 respectively. Using 143 markers common to the two maps, a consensus map with 225
SSR loci and total map distance of 1,152.9 cM was
developed. Comprehensive quantitative trait locus
(QTL) analysis detected a total of 28 QTL for LLS and
15 QTL for rust. A major QTL for LLS, namely
QTLLLS01 (GM1573/GM1009-pPGPseq8D09), with
10.27–62.34% phenotypic variance explained (PVE)
was detected in all the six environments in the RIL-4
population. In the case of rust resistance, in addition to
marker IPAHM103 identified earlier, four new markers
(GM2009, GM1536, GM2301 and GM2079)
showed significant association with the major QTL
(82.96% PVE). Localization of 42 QTL for LLS and
rust on the consensus map identified two candidate
genomic regions conferring resistance to LLS and rust.
One region present on linkage group AhXV contained three QTL each for LLS (up to 67.98% PVE) and rust
(up to 82.96% PVE). The second candidate genomic
region contained the major QTL with up to 62.34%
PVE for LLS. Molecular markers associated with the
major QTL for resistance to LLS and rust can be
deployed in molecular breeding for developing
groundnut varieties with enhanced resistance to foliar
diseases.
 
Publisher Springer Netherlands
 
Date 2012
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/4277/4/Mol_Breeding_30_773%E2%80%93788_2012.pdf
Sujay, V and Gowda, M V C and Pandey, M K and Bhat, R S and Khedikar, Y P and Nadaf, H L and Gautami, B and Sarvamangala, C and Lingaraju, S and Radhakrishan, T and Knapp, S J and Varshney, R K (2012) Quantitative trait locus analysis and construction of consensus genetic map for foliar disease resistance based on two recombinant inbred line populations in cultivated groundnut (Arachis hypogaea L.). Molecular Breeding, 30 (2). pp. 773-788. ISSN 1572-9788