Xinguang  Cai , Qiangsheng  Qian

Modern Agricultural Research Center, Cuixi Academy of Biotechnology, Zhuji, 311800, Zhejiang, China
Author    Correspondence author
Rice Genomics and Genetics, 2024, Vol. 15, No. 6   
Received: 27 Sep., 2024    Accepted: 26 Oct., 2024    Published: 23 Dec., 2024

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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.

Hybrid rice; Intersubspecific heterosis; High-yield traits; Genomic analysis; Quantitative trait loci (QTLs)