Genetics of fertility restoration in hybrid rice
C R Anandakumar1, S Subramaniam
1Department of Agricultural Botany, Agricultural College and Research Institute, Madurai-625104, Tamilnadu, India.
Abstract:
The cross combination involving 14 male-sterile lines in rice, when crossed with different maintainers, showed fertility restoration in certain combinations. When F2 segregating populations were classified based on spikelet fertility, fertility restoration was shown to be governed by 3∶1, 9∶3∶3∶1, and 12∶3∶1, due to allelic differences. This indicated that the cytosterility of the same group showed monogenic fertility restoration, whereas crossing plants belonging to different cystosterile groups showed a digenic pattern of segregation.
Related Concept Videos
Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal...
Dihybrid Crosses
Plant Breeding and Biotechnology
Hybrid Zones
Monohybrid Crosses
What is a Species?


