Mapping Genomic Regions for Grain Protein Content and Quality Traits in Milled Rice (<i>Oryza sativa</i> L.)

Mapping Genomic Regions for Grain Protein Content and Quality Traits in Milled Rice (<i>Oryza sativa</i> L.)

Grain protein content (GPC) is gaining attention due to increasing consumer demand for nutritious foods. The present study carried out at ICAR-IIRR, Hyderabad, focused on the identification of quantitative trait loci (QTLs) linked with GPC and other quality traits. We utilized a population of 188 F&...

Full description

Saved in:
Bibliographic Details
Main Authors: Violina Bharali, Suneetha Yadla, Srinivas Thati, Bhargavi Bitra, Divya Karapati, Neeraja Naga Chirravuri, Jyothi Badri, Raman Meenakshi Sundaram, Aravind Kumar Jukanti
Format: Article
Language:English
Published: MDPI AG 2025-03-01
Series:Plants
Subjects:
grain protein content
QTL mapping
F<sub>2</sub> population
variability
Online Access:https://www.mdpi.com/2223-7747/14/6/905
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Grain protein content (GPC) is gaining attention due to increasing consumer demand for nutritious foods. The present study carried out at ICAR-IIRR, Hyderabad, focused on the identification of quantitative trait loci (QTLs) linked with GPC and other quality traits. We utilized a population of 188 F<sub>2</sub> individuals developed from BPT 5204 (low GPC) X JAK 686 (high GPC) for QTL analysis. QTL analysis yielded four significant QTLs for GPC, three for amylose content, and multiple QTLs for other quality traits. <i>qPC1.2</i>, a major QTL in milled rice, was located in the marker interval RM562-RM11307 on chromosome 1 with an LOD value of 4.4. <i>qPC1.2</i> explained 15.71% of the phenotypic variance (PVE). Additionally, the Interval Mapping for Epistatic QTLs (IM-EPI) method detected 332 pairs of di-genic epistatic QTLs. Fifteen QTLs exhibited a positive additive effect, indicating that the contributing allele(s) was from JAK 686. Five F<sub>2</sub> plants, <i>viz</i>., F<sub>2</sub>-140, F<sub>2</sub>-12, F<sub>2</sub>-7, F<sub>2</sub>-147, and F<sub>2</sub>-41, exhibited a high GPC of 14.67%, 14.36%, 14.32%, 13.60%, and 13.36%, respectively. Additionally, these plants also exhibited high per-plant grain yield (~17.0–29.0 g) with desirable agronomic traits. The QTLs identified are valuable resources for developing high-grain-protein varieties with high grain yield and desirable quality traits.
ISSN:2223-7747

Similar Items