Research articles
ScienceAsia 47 (2021):ID 418-424 |doi:
10.2306/scienceasia1513-1874.2021.053
Genetic effects on the number of spikelets per panicle
and fertility restoration in three-line hybrid rice
breeding system
Weerachai Matthayatthaworn, Prapa Sripichitt, Tanee Sreewongchai*
ABSTRACT: Number of spikelets per panicle is one of the important characters for rice breeding programs to increase
yield potential. The generation mean analysis based on six populations: viz., P1, P2, F1, F2, BC1, and BC2 of
IR80151A/CH1 with utilizing cytoplasmic-genetic male, was performed. The results showed that dominant gene
action was more important than additive type implying that selection in early segregating generations is ineffective
and the character could be better exploited through heterosis breeding. Since hybrid rice was used the advantage
of the dominant effect through heterosis, due to the role of more favorable dominant genes in F1 hybrid than in both
parents. In addition, utilizing cytoplasmic-genetic male sterility in the populations could specify gene control of fertility
restoration in hybrid rice. The results revealed that two dominant complementary genes with epistasis controlled the
fertility-restoration of wild-abortive cytoplasmic male sterility system (WA-CMS). This information will be useful for
future rice breeding in three-line hybrid system.
Download PDF
120 Downloads 2441 Views
| a |
Department of Agronomy, Faculty of Agriculture, Kasetsart University, Bangkok 10900 Thailand |
* Corresponding author, E-mail: tanee@yahoo.com
Received 1 Jun 2020, Accepted 27 Apr 2021
|
