Genotype dependent radiosensitivity of autotetraploids in Trigonella foenum-graecum L
1Cytogenetics and Plant Breeding Laboratory, Botany Department, Lucknow University, Lucknow, India.
Abstract:
Different diploids of Trigonella foenum-graecum L. and their corresponding autotetraploids were seed-treated with 40 krad of γ-rays, and parameters such as germination, survival, growth reduction, pollen fertility, pod setting, etc. were recorded. A stimulation of seed germination due to the irradiation could be observed. Contrary to the general rule that polyploids are more radioresistant than their corresponding diploids, one 4x strain was completely killed while the 2x version survived comparatively well. Apparently gene reduplication is not the overall protective mechanism as was once earlier believed. The importance of genotypic influence on radiosensitivity was demonstrated at both the 2x and 4x level. The limitation of interphase chromosome volume and degree of ploidy in predicting radiosensitivity is discussed.
More Related Videos
Related Concept Videos
Pharmacogenetics of Drug Targets: β₂-Adrenergic Receptors, Apo E, Thymidylate Synthase
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...
Other Unique Bacteria
Overview of Transposition and Recombination
Transgenic Organisms
Transgenic Plants
The first-ever transgenic plant was a tobacco plant developed in 1983 that showed resistance against the tobacco mosaic virus. Since then, many transgenic plants have been developed and commercialized for improving the agricultural, ornamental, and horticultural value of a crop plant. Transgenic...


