The writer obtained the following results from the various cross combinations between normal and asynaptic plants in wild senna (C. Tora L. ) : (1) Percentage of the pods for the total flowers pollinated was 91 and 96 respectively in the cross combination of N x N and N-selfing. (2) No seed was produced when the pollens of asynaptic plant was pollinated. (3) Average number of seeds for each pod and plant was only 2 and 11.5 in the cross combinations of As x N. (4) It has been clearly ascertained that the inheritance of this asynaptic plant is dominated by a simple reccessive gene. These facts obtained from the present crossing experiments indicate that the asynaptic phenomena may also occur in the E. M. Cs as may in the P. M. Cs.
染色体不対合個体の稔性は, 植物に依り又個体によつて相違が見られているが, 一般に高度の不稔性によつて特色づけられる(Beadle,'30, on Zea; Clausen,'31, on Nicotiana; Blakeslee & Avery,'34, on Datura; 山本,'34, on Rumex, etc.). 又不対合個体の遺伝様式について之迄に確められたものでは, 優性遺伝をするCrepis(Hollingshead,'30)の場合を除いては, 単因子の劣性比にこの個体を分離するとされている(Beadle & McClintock,'28, Beadle,'30, on Zea; Blakeslee,'28, on Datura; Schwemmle,'28, on Oenothera; Clausen,'31, on Nicotiana; Ekstrand,'32, on Hordeum; Koller,'38, pn Pisam). 筆者は不対合エビスグサの稔性並びに遺伝機構を明かにする目的で, 1948～49両年に亘り, 種々の組合せのもとに交配を試みた. ここにその交配組合せと成功歩合, 並びに不稔個体の分離比につき報告する.
Mendeley出力
