Abstract
Hybrids between the C(4)-like species, Flaveria brownii, A. M. Powell and the C(3)-C(4) intermediate species Flaveria linearis Lag., Flaveria floridana Johnston, and Flaveria oppositifolia (DC.) Rydb. exhibited bivalent chromosome pairing during meiosis and stainability of pollen was high, ranging from 51 to 95%. An F(2) population produced from an F. brownii x F. linearis F(1) hybrid, exhibited bivalent chromosome pairing and high pollen stainability indicating a high degree of fertility in the hybrid. Oxygen inhibition of apparent photosynthesis averaged 6.8% for F. brownii and 22.2% for the C(3)-C(4) species (in two experiments), and F(1) hybrids exhibited inhibitions which were intermediate to their parents. Values of carbon dioxide compensation concentration determined at low irradiance were 4.0, 34.0, and 6.5 microliters per liter for F. brownii, F. linearis and their F(1) hybrid, respectively. The mean value at low irradiance for 33 F(1) plants was 6.8 microliters per liter, and individual values ranged only from 3.7 to 11.7 microliters per liter. Anatomical characteristics for the F(1) hybrid leaves were intermediate to those of the parents, and there was considerable variation among F(2) plants derived from F. brownii x F. linearis. In the F(2) population delta(13)C values ranged from -27 per thousand to -20 per thousand. The expression of more C(4)-like characteristics by the F(1) hybrids in this study and their apparent high fertility make them promising specimens for producing segregating populations for use in C(4) inheritance studies.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
