QTL Identification in Presence of QTL×Environment Interaction
Journal Title: International Journal of Computational Engineering and Management IJCEM - Year 2012, Vol 15, Issue 6
Abstract
Quantitative traits are the traits controlled by many genes and each of the genes has a small effect on the trait. The loci controlling quantitative traits are referred to as QTLs (Quantitative Trait Loci) and the procedure of finding and locating the QTLs are called QTL mapping. The available literature on use of molecular markers for detecting loci influencing the performance of Maize in drought stress is very scanty in India, so the data considered belongs to Maize crop in drought stress, for the present investigation. Mapping population with 236 RILs (Recombinant Inbred Lines), using Ac7643S5 (drought tolerant) and Ac7729 (drought susceptible) as male parent, at CIMMYT and evaluated in India under AMBIONET (Asian Maize Biotechnology Network), Maize Genetic Unit, IARI is considered for the present investigation. Phenotypic data on different plant characters have been utilized for the present study. Genotypic data on RILs obtained through 138 RFLP markers and a linkage map of a total length of 2250 cM with an average density of 17 cM are used for QTL detection. Genotypic data is obtained through molecular marker assay whereas phenotypic data is derived from evaluation of mapping population of the target traits of interest. The analysis is done using software QTLMapper (version 1) and it is found that marker MK28 has main-effect on four traits, marker MK28, MK101 and MK34 has main-effect on two traits. Interaction effect has also been found in different marker pairs. The results are obtained considering the main and interaction effect of markers and it is seen that for the trait Anthesis-Silking Interval one QTL is present on chromosome 1 located on marker MK13. For the trait Ear Height, three QTLs are present, first QTL on chromosome 1 located on 4cM to right from MK8, second QTL on chromosome 2 located on MK34 and third QTL on chromosome 8 located on MK101. For the trait Grain Yield two QTLs are present, first is on chromosome 2 located on 2cM to the right from MK28 and second QTL on chromosome 4 located on MK51. For the trait Ear Diameter one QTL is present on chromosome 3 located on MK35. For the trait 100 Kernel Weight one QTL is present on chromosome 2 located on 14cM to the right of MK27. For the trait Plant Height one QTL is present on chromosome 8 located on marker MK101.
Authors and Affiliations
Nitiprasad N. Jambhulkar
Keywords
Related Articles
- EP ID EP135363
- DOI -
- Views 93
- Downloads 0
Personal Protective Equipments are Last Resort of Safety
This study and analysis will deal with this concept that before applying control over hazard to reduce risk, think on the hierarchy of control over hazards. The Personal Protective Equipments should be the last resort t...
Automization of Rationing System
In this system the proposed concept is to replace the manual work in public distribution system. India’s PDS is the largest retail system in the world. Ration distribution is one of controversial issues that involves cor...
High Speed and Reduced Power – Radix-2 Booth Multiplier
A multiplier is one of the key hardware blocks in most digital and high performance systems such as FIR filters, digital signal processors and microprocessors etc. A system’s performance is generally determined by the pe...
Changing Role of Test Manager in Changing Situations
According to analyst Nelson Hall, the global testing services market was $8.4bn in 2011, and although 2012 is expected to be flat, it predicts an average 9% growth every year over the next five years. Amidst of these...
OFDM-PAPR Reduction using Statistical Clipping and Window based Noise Filtering
This paper presents an alternate approach for the iterative clipping and filtering (ICF) method used for the peak-to-average-power-ratio (PAPR) reduction in OFDM systems. As the resultant in-band noise due to clipping af...