The Extremely Frequent Occurrence of Haploids in Some Plants of a Common Wheat Strain with the Aegilops tyiuncialis Cytoplasm
著者
T.Ryu ENDO
(Endo ryu)
教養部
T.KATAYAMA
(katayama)
教養部
版
Publisher
出版地
奈良
出版者
奈良大学
上位タイトル
奈良大学紀要
(Memoirs of the Nara University).
Vol.4号,
(1975.
12)
,p.90-
94
識別番号
ISSN
03892204
抄録
Many attempts have been made to obtain haploid plants of various species, with
some positive results. Except for anther culture, however, all methods so far have been successfully applied to only a very limited number of species: i,e., pollination of Xrayed pollen grains in Triticum monococcum (Katayama, 1934); selection of specific
strains with effective screening in Zea mays (Chase, 1949); use of an alien cytoplasm in T. aestivum (Kihara and Tsunewaki, 1962); and elnbryo culture in Hordeum vulgare(Kasha and Kao, 1970)and T. aestivum (Barclay, 1975). At present, alien cytoplasms are quite useful for inducing haploids in a single strain of common wheat, T.
aestivum strain Salmon, and their effect on haploid induction in this strain is rather prominent and stable. Eight species of the genus Aegilops, a related genus of Triticum,
are known to possess cytoplasms that induce haploids when incorporated with Salmon's nucleus(Tsunewaki et al., unpubl.). Ae. triuncialis is one of them. This year we found four plants of Salmon with the Ae.triucialis cytoplasm that produced so many haploid and twin seedlings that maintenance of the line became almost impossible.
We here report the extraordinarily high frequency of haploids and twins observed in the four plants of this line, and discuss briefly the cause.
