Screening for a Novel Gene, OsPSLSq6, Using QTL Analysis for Lodging Resistance in Rice

Abstract

Lodging is the most common factor that affects crop productivity, reducing yield, grain quality, and harvesting efficiency of rice and other cereal crops. The Cheongcheong (Indica)/Nagdong (Japonica) doubled haploid (CNDH) genetic map was used to develop a lodging-resistant variety. The major agricultural traits of rice related to lodging resistance, such as the pushing strength of the lower stem before the heading date (PSLSB) at reproductive growth period and pushing strength of the lower stem after the heading date (PSLSA) at full ripe period were investigated. A quantitative trait locus (QTL) analysis of PSLSA and PSLSB detected on RM439-RM20318 on chromosome 6 has overlap in three consecutive years. RM439-RM20318 on chromosome 6 contained 15 lodging resistance candidate genes. Among the candidate genes, Os06g0623200, named OsPSLSq6, which is similar to Cinnamoyl-CoA reductase, involved lignin biosynthesis in defense responses. Lignin is the main structural component of vascular plants’ secondary cell wall, which is not only related to plant growth and development but also to mechanical strength. OsPSLSq6 opens new possibilities to control lignin synthesis to improve lodging resistance. OsPSLSq6 can be used as a target gene for further studies to provide important information for the marker-assisted improvement of target traits and cloning genes underlying the QTL of interest.

Genome-wide association studies for a comprehensive understanding of the genetic architecture of culm strength and yield traits in rice

“…In the genomic region of qSM1.2 , cinnamoyl-CoA reductase ( OsCCR6 ) was identified at a distance of 117.45 kb. OsCCR6 is a key enzyme in lignin biosynthesis ( Zhao et al., 2021 ). Lignin is the main structural component of vascular plants’ secondary cell wall, which is related not only to plant growth and development but also to mechanical strength.…”

Identification of a Major Locus for Lodging Resistance to Typhoons Using QTL Analysis in Rice

“…Therefore, in the present study we detected new loci, qTyM6 and qTyH6 , involved in lodging resistance to typhoons. Furthermore, we previously evaluated the pushing strength of the lower stem and internode length to detect the QTL involved in lodging resistance [ 25 , 26 ] in the CNDH population. The results overlapped with similar loci ( qPSLSA6-2 , qPSLSB6-5 , qLTI6-2 , and qSDUI11-1 ) on chromosomes 6 and 11 ( Figure 3 and Table S5 ).…”

Identification of Candidate Gene for Internode Length in Rice to Enhance Resistance to Lodging Using QTL Analysis

“…As the most important crop, its demand increases daily, increasing its attention in the scientific community to develop healthier and more productive rice cultivar to meet the feeding demand of the world. However, with the recent deterioration of the environment and the increasing number of typhoons, rice lodging has become serious [ 1 ]. Among these environmental conditions, lodging is considered one of the most affected environmental conditions that makes harvesting difficult and causes great loss of grain yield and quality [ 2 ].…”