Cytogenetical Studies in the Inbred Lines of Radish (Raphanus sativus L. var. radicola Pers.) and Their Hybrids
III. Meiotic abnormalities
1979 年 44 巻 1 号 p. 1-5
詳細
1979 年 44 巻 1 号 p. 1-5
Meiotic abnormalities were studied in three inbred lines of radish (Raphanus sativus L. var. radicola Pers.), namely LS-337/24, LS-337/25 and LS-43/51, their F1 hybrids and the original population. Plants of the inbred lines showed greater meiotic abnormalities at metaphase I and anaphase I in comparison to those of hybrids and the original population. Univalents and anaphase bridges with or without fragments were more frequently present in the inbred lines whereas they were almost absent in the hybrids and the original population. Besides other meiotic abnormalities such as stickiness, desynapsis, non- and unequal segregation of chromosomes at anaphase I, laggards, premeiotic errors etc. were also noted in the inbred lines. It has been demonstrated that meiotic abnormalities in radish is genotypically controlled. The mechanism of the formation of anaphase bridges has also been discussed.
