Xinguang Cai Xinguang Cai

Author    Correspondence author
Rice Genomics and Genetics, 2024, Vol. 15, No.   
Received: 01 Jan., 1970    Accepted: 01 Jan., 1970    Published: 23 Dec., 2024

The development of hybrid rice varieties has significantly contributed to global food security by enhancing yield and quality traits. Recent advancements in hybrid rice breeding have focused on integrating intersubspecific heterosis and high-yield traits through rational design and genomic approaches. Studies have demonstrated that the exploitation of wide-cross compatibility and the identification of heterosis-associated genes, such as qSS7 and qHD8, are crucial for achieving high yield in hybrid rice varieties. Additionally, the integration of genomic, phenomic, and transcriptomic analyses has uncovered multiple quantitative trait loci (QTLs) that cumulatively drive yield heterosis, highlighting the importance of superior alleles and their dominance effects. Despite the progress, challenges such as poor grain-filling and low seed-setting rates in super hybrid rice remain, necessitating further research to optimize these traits. This study proved that the recent advancements in hybrid rice breeding, emphasizing the integration of intersubspecific heterosis and high-yield traits to develop superior hybrid rice varieties.