Cytological study of radiation induced alterations in cytoplasmic factors controlling male sterility in corn. Progress report, February 28, 1973--December 1, 1973

Technical Report · Mon Jan 01 04:00:00 EST 1973

DOI:https://doi.org/10.2172/4363347· OSTI ID:4363347

Edwardson, J. R.

Cytoplasmic male sterile accessions, other than T-type, are being backcrossed to adapted maintainer and restorer inbred corn lines. Fertile selections from gamma -irradiated T-type corn continue to exhibit resistance to infection by race-T of Helminthosporium maydis in field and greenhouse tests. Cytological comparisons of these fertile selections and T-sterile, maintainer, and restorer lines are continuing. Dominant male sterility and its suppression in S-cytoplasm corn is being investigated. lnduction of cytoplasmic male sterility in normal cytoplasm corn and suppression of susceptibility to Helminthosporium maydis infection in T cytoplasm corn is being attempted with chemical mutagens. Consistent differences in cytoplasmic inclusions in sterile and maintainer Vicia faba were observed. Consistent differences in mitochondria were observed in cytological comparisons of normal and sterile corn. These abnormal mitochondria and non-Mendelian plastid abnormalities in corn, sorghum, tobacco, and petunia will be used in studying the fertilization process. Investigations of the properties of Datura Q-virus are near completion. Cytological and serological studies indicate the Q-virus is a strain of tobacco streak virus. Graft-transmission of cytoplasmic male sterility is being attempted in sunflower. (auth)

• Research Organization: Florida Univ., Gainesville (USA). Dept. of Agronomy
• NSA Number: NSA-29-010377
• OSTI ID: 4363347
• Report Number(s): ORO--2583-11
• Country of Publication: United States
• Language: English

Related Subjects

*MAIZE-- STERILITY
*MUTATIONS-- RADIOINDUCTION
BIOLOGICAL EFFECTS
BIOLOGICAL RADIATION EFFECTS
CELL CONSTITUENTS
CYTOLOGY
CYTOPLASM
DISEASE RESISTANCE
FERTILITY
FUNGI
GAMMA RADIATION
GENETIC VARIABILITY
IRRADIATION
MALES
MITOCHONDRIA
MUTAGENS
N48410* --Life Sciences--Radiation Effects on Plants--Basic Studies
NICOTIANA
ORNAMENTAL PLANTS
PHOTON BEAMS
PLANT CELLS
PLANTS
REPRODUCTION
SORGHUM
VARIATIONS
VICIA
VIRUSES RADIOINDUCTION