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Linkage mapping and QTL analysis of drought related traits in Groundnut (Arachis hypogaea L.)

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Relation http://oar.icrisat.org/6479/
 
Title Linkage mapping and QTL analysis of drought related traits in Groundnut (Arachis hypogaea L.)
 
Creator Gautami, B
 
Subject Groundnut
Genetics and Genomics
 
Description Groundnut (Arachis hypogaea L.), commonly called peanut, is one of
the most important oilseed crops in the smallholder-farming sectors of
the semi-arid tropical regions of the world where drought is the major
production constraint. Until recently, the low level of molecular diversity
in the cultivated groundnut genome and the scarcity of co-dominant
DNA-based molecular markers were critical constraints in using modern
genomics in groundnut improvement. To increase the number of
molecular markers for groundnut, 23 novel simple sequence repeat (SSR
or micro-satellite) markers were isolated from a SSR-enriched genomic
library. These new markers, along with 3215 already available markers
from different sources were tested for detecting polymorphism among
parental genotypes of the two recombinant inbred line (RIL) mapping
populations (ICGS 76 × CSMG 84-1 and ICGS 44 × ICGS 76) to
understand the genetic basis and identification of QTLs for drought
related traits. As a result, two new genetic linkage maps were developed
with 119 (2208 cM) and 82 (831 cM) marker loci. In addition, a
consensus map consisting of 293 SSR loci located across 20 linkage
groups and spanning a map distance of 2841 cM was constructed using
the two new genetic maps (from the present study) and the reference
map TAG 24 × ICGV 86031....
 
Date 2012
 
Type Thesis
PeerReviewed
 
Format application/pdf
 
Language en
 
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Identifier http://oar.icrisat.org/6479/1/Gauthami_theis_2012.pdf
Gautami, B (2012) Linkage mapping and QTL analysis of drought related traits in Groundnut (Arachis hypogaea L.). PhD thesis, International Crops Research Institute for the Semi-Arid Tropics.