Identification of novel Quantitative Trait Loci (QTLs)for submergence tolerance in Oryza sativa L. derived from moderately tolerant IR64 variety
Date
4-2013
Degree
Bachelor of Science in Biology
College
College of Arts and Sciences (CAS)
Adviser/Committee Chair
Dela Viña, Celia B.
Abstract
To search for novel quantitative trait loci (QTLs), phenotyping was done by conducting submergence screening of 540 families of the F7 recombinant inbred line (RIL) population which was developed in the International Rice Research Institute (IRRI) from the cross between the submergence susceptible IR42 and moderately tolerant variety IR64 population. A subset of 94 families representing the two extreme phenotypic tails was used for genotyping and QTL analysis. Phenotype data showed transgressive segregation which indicated several families having a higher survival rate than the donor parent IR64 and lower survival rate than IR42. Using six polymorphic SSR markers and 52 polymorhic SNP markers, two potential novel QTLs were identified from the largest QTL was on chromosome 6 with a LOD score of 3.79 and additive effect of 17.45. The identification of three non-SUB1 QTLs from IR64 suggests that this variety may have potential QTLs or genes that are independent of the SUB1A gene and can possibly be combined with SUB1 QTL through marker-assisted backcrossing to increase submergence tolerance in rice varieties that are planned in flood-prone areas.
Language
English
Location
UPLB Main Library Special Collections Section
Call Number
Thesis
Recommended Citation
Labios, Reuben Jacob Dicen, "Identification of novel Quantitative Trait Loci (QTLs)for submergence tolerance in Oryza sativa L. derived from moderately tolerant IR64 variety" (2013). Undergraduate Theses. 456.
https://www.ukdr.uplb.edu.ph/etd-undergrad/456
Document Type
Thesis