Identification of Quantitative Trait Loci for Plant Type and Seed Yield Components among Recombinant Inbred Lines in Pigeon pea [Cajanus cajan (L.) Mills] Paugh

Suman Parre, N.K. Singh
2019 International Journal of Current Microbiology and Applied Sciences  
Journal homepage: http://www. ijcmas.com Poor and inconsistent yields of the Pigeonpea cultivation across different environments grown in respective seasons reduce the economic benefits for the farmers. Besides tolerances/ resistance to abiotic and biotic stresses, plant type and seed yield components of Pigeonpea are the principal determinants of the consistent yields. The contemporary research was orchestrated for the identification of QTLs for plant type and seed yield components. Two
more » ... ponents. Two contrasting parents H2001-4 and ICP 7035 were crossed and advanced to F6: 7 generation for the development of recombinant inbred lines using single seed development method. Correlation studies and assessment of genetic variability parameters in two different environments was made, which provided valuable information about the genetics underlying the traits related to plant type and seed yield components. Consistent QTLs for three traits such as plant height, days to maturity and days to flowering across two environments were identified with the assistance of SNP markers which were mapped unto chromosomes. Positive significant trait-trait correlation had been found stipulating that there may be close linkage between the loci governing the trait or due to pleiotropy. Consistency paves a way for the exploitation of identified QTLs through marker assisted selection. Additionally, fine mapping may also help in tracing out candidate gene markers by employing synteny. K e y w o r d s
doi:10.20546/ijcmas.2019.808.020 fatcat:teald4jn75eshbadkuokucknfm