The study on the genetic basis of heterosis has received significant attention in recent years. In this study, using a set of introgression lines (ILs) and corresponding testcross F(1) populations, we investigated heterotic loci (HL) associated with six yield-related traits in both Oryza sativa L. subsp. indica and japonica. A total of 41 HL were detected on the basis of mid-parent heterosis values with single-point analysis. The F(1) test-cross population showed superiority in most yield-related traits and was characterized by a high frequency of overdominant HL. Thirty-eight of the 41 HL were overdominant, and in the absence of epistasis, three HL were dominant, suggesting that heterotic effects at the single-locus level mainly appeared to be overdominant in rice. Twenty-four HL had a real positive effect, suggesting that they are viable candidates for the improvement of rice yield potential. Compared with the quantitative trait loci (QTLs) detected in the ILs, only six out of the 41 (14.6%) HL were detected in QTL analysis under the same statistical threshold, indicating that heterosis and trait performance may be conditioned by different sets of loci.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3406766 | PMC |
| http://dx.doi.org/10.1270/jsbbs.61.380 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Impact of structural variations and genome partitioning on bread wheat hybrid performance.
Funct Integr Genomics
January 2025
INRAE, Genetics, Diversity and Ecophysiology of Cereals, Université Clermont Auvergne, 63000, Clermont-Ferrand, France.
The agronomical interest of hybrid wheat has long been a matter of debate. Compared to maize where hybrids have been successfully grown for decades, the mixed results obtained in wheat have been attributed at least partially to the lack of heterotic groups. The wheat genome is known to be strongly partitioned and characterized by numerous presence/absence variations and alien introgressions which have not been thoroughly considered in hybrid breeding.
View Article and Find Full Text PDFMolecular Mechanisms of Heterosis and Its Applications in Tree Breeding: Progress and Perspectives.
Int J Mol Sci
November 2024
Key Laboratory of Eco-Environments of Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Chongqing 400715, China.
Article Synopsis
- * The review highlights the genetic, molecular, and epigenetic mechanisms of heterosis, alongside modern predictive methods for improving tree species' growth rates and resistance to environmental stresses.
- * Future research directions emphasize the potential integration of advanced genomics, CRISPR gene-editing, and molecular marker-assisted selection to enhance tree hybrid breeding practices.
Historic breeding practices contribute to germplasm divergence in leaf specialized metabolism and ecophysiology in cultivated sunflower (Helianthus annuus).
Am J Bot
November 2024
Department of Biology, University of Central Florida, Orlando, 32816, FL, USA.
Premise: The use of hybrid breeding systems to increase crop yields has been the cornerstone of modern agriculture and is exemplified in the breeding and improvement of cultivated sunflower (Helianthus annuus). However, it is poorly understood what effect supporting separate breeding pools in such systems, combined with continued selection for yield, may have on leaf ecophysiology and specialized metabolite variation.
Methods: We analyzed 288 lines of cultivated H.
Genetic architecture of phosphorus use efficiency across diverse environmental conditions: insights from maize elite and landrace lines.
J Exp Bot
January 2025
Institute of Plant Breeding, Seed Science and Population Genetics, University of Hohenheim, Stuttgart, D-70593, Germany.
Phosphorus is an essential nutrient for all crops. Thus, a better understanding of the genetic control of phosphorus use efficiency evident in physiological, developmental, and morphological traits and its environmental plasticity is required to establish the basis for maintaining or enhancing yield while making agriculture more sustainable. In this study, we utilized a diverse panel of maize (Zea mays L.
View Article and Find Full Text PDFIntegrative multi-omics analysis reveals genetic and heterotic contributions to male fertility and yield in potato.
Nat Commun
October 2024
Shenzhen Branch, Guangdong Laboratory of Lingnan Modern Agriculture, Key Laboratory of Synthetic Biology, Ministry of Agriculture and Rural Affairs, Agricultural Genomics Institute at Shenzhen, Chinese Academy of Agricultural Sciences, 518120, Shenzhen, China.
Article Synopsis
- - The research focuses on simplifying genetic analysis in potatoes by transitioning from complex tetrasomic inheritance to a seed-propagated diploid model, enhancing genetic study accuracy.
- - A diploid F potato population was developed from inbred lines, leading to the identification of 25,770 quantitative trait loci (QTLs) through the analysis of 20,382 traits from a comprehensive multi-omics dataset.
- - The study reveals important findings on heterosis (hybrid vigor) related to yield and male fertility, identifying key genetic factors that could aid in improving diploid potato breeding.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!