Linkage mapping and QTL analysis of drought related traits in Groundnut (Arachis hypogaea L.)
Year: 2012
Type: dissertation
Abstract: Groundnut (Arachis hypogaea L.), commonly called peanut, is one of \nthe most important oilseed crops in the smallholder-farming sectors of \nthe semi-arid tropical regions of the world where drought is the major \nproduction constraint. Until recently, the low level of molecular diversity \nin the cultivated groundnut genome and the scarcity of co-dominant \nDNA-based molecular markers were critical constraints in using modern \ngenomics in groundnut improvement. To increase the number of \nmolecular markers for groundnut, 23 novel simple sequence repeat (SSR \nor micro-satellite) markers were isolated from a SSR-enriched genomic \nlibrary. These new markers, along with 3215 already available markers \nfrom different sources were tested for detecting polymorphism among \nparental genotypes of the two recombinant inbred line (RIL) mapping \npopulations (ICGS 76 × CSMG 84-1 and ICGS 44 × ICGS 76) to \nunderstand the genetic basis and identification of QTLs for drought \nrelated traits. As a result, two new genetic linkage maps were developed \nwith 119 (2208 cM) and 82 (831 cM) marker loci. In addition, a \nconsensus map consisting of 293 SSR loci located across 20 linkage \ngroups and spanning a map distance of 2841 cM was constructed using \nthe two new genetic maps (from the present study) and the reference \nmap TAG 24 × ICGV 86031....
Author: Bhimana Gautami
Language: English
Subfield: Plant Science
Domain: Life Sciences
SDG: Zero hunger
Open Access status: green
OpenAlex ID: W173244303