Studies on Restoration and Substitution of Nucleus (Genome) in Aegilotricum, IV
Genome exchange between durum and ovata cytoloplasm and its theoretical consideration for male-sterility
1957 年 22 巻 1 号 p. 30-39
詳細
1957 年 22 巻 1 号 p. 30-39
1.) Transfer of durum genomes into ovata cytoplasm of Aegilotricum No. 2 was made in order to ascertain if male-sterility might always occur even if any lines of Aegilotrium No. 2 are used. All resulting offspring be-came completely male-sterile as in previous experiments.
2) Using pure ovata plants as a female parent, durum genomes were substituted into ovata cytoplasm. Resulting 14II-plants become male-sterile without exception.
3) Using the new synthesized amphidiploid (durum_??_+ovata _??_), restoration of durum genomes was made. All 14II-offspring showed normal pollenf ertility.
4) Ovata genomes were replaced again in the cytoplasm of male-sterile durum plants. All resulting 14II-individuals were normal with high pollenfertility.
5) Placing the ovata genomes into durum cytoplasm was carried out. Most of 14II-plants showed normal pollen-fertility.
6) It has been discussed that the male-sterile factor came from the ovata cytoplasm and that ovata plants contain a certain nuclear gene which makes the male-sterile factor inactive.
