Male Sterility in Pea VI
Gene action duplicity
1994 年 59 巻 2 号 p. 195-201
詳細
1994 年 59 巻 2 号 p. 195-201
Two track male meiosis is exhibited by a γ-ray induced monogenic recessive male sterile mutant of pea (Pisum sativum L). Whereas the ms gene causes cytomixis and meiotic arrest in one third of the PMCs, in the remaining PMCs, the meiosis is highly abnormal; the main meiotic anomalies being dys-synapsis, incipient MI plate formation, irregular Al and All disjunctions and unequal sized dyad, tetrad and polyad production. All the microspores formed degenerate and the mutant is completely male sterile. Since only 34% PMCs exhibit cytomixis and meiotic arrest, it is intriguing how and why do the remaining 66% PMCs escape cytomixis and continue meiosis abnormally.
