Sept., 1921.1 YASUT:— OX 2 HE BEHAVIOR OF CHROMOSOMES 1G5 



This maj- contribute to the origin of the variation or new forms 

 in the offsprings on the one hand, while this ma}^ affect the viabilit}' 

 of the male gamates and cause the sterility on the other hand. 



7. Fj plants between Papaver somnifcrum and P. orient ale are 

 more vigorous than their parent plants. The F, plant appears 

 mostly like P. orientale the c parent, but in some external characters 

 it is intermediate between both parents. The male gamates are 

 mostly sterile. 



In closing I wish to express my cordial thanks to Professor K. 

 Fujii for the valuable materials given me for this experimental 

 study and important advices and criticisms throughout the course of 

 the work. VLy deep thanks are also due to Professor J. Matsdmura 

 and Dr. T. Nakai for the facilities given during the progress of 

 the experiment. 



Literature Cited 



Bateson, W. (1907) The progress of genetics since the rediscovery of Mendel's papers. 



Prog, rei Bot. 1, p. o68. 

 BziACKBURN, K. B. and Harrison, J. W. H. (1921) The status of the British rose 



form as determined by their cytological behavior. Ann. Bot. vol. 35, p. 159. 

 Davis, B. M. (1911) Cytological studies on Oenothera III. Ann. Bot. vol. 25, p. 941. 

 Djgby, L. (1912) Cytology of Primula hybrids. Ann. Bot. vol. 26, p. 357. 

 Farmer, B. (1912) Telosynapsis and parasynapsis. Ann. Bot- vol. 52, p. 623. 

 FoCKE, W. O. (1881) Die Pflanzen-mischlinge. 

 Fujii, K. (1920) On the conception of "Id" and the question of its transmutability, 



(Japanese). Bot. Mag. Tokyo, vol. 34, pp. (99)-(125). 

 Gate-S, R. R. (1907) Pollen development in hybrids of Oenothera lataX Oe. Lamarckana 



and its relation to mutation. Bot. Gaz. vol. 43, p. 81. 



(1909) The behavior of chromosomes in Oenothera lata X Oe. gi'jas. Bot. Gaz. 



vol. 48, p. 179. 



Geerts, J. ]M. (1999) Beitriige zur Kenntniss der Cytologie und der partiellen 



Sterilitat von Oenothera Lamarckiana. Recueil. Trav. Bot. Neerl. v. livr. 2-4, 



pp. 93-209. 

 ■ — (1911) CvtologiscVie Untersucliungen einiger Bastarde von Oenothera glgas. Ber. 



deut. bot. Gesellsch. Bd. 29, S. 160. 

 JuEL, H. O. (1900) Beitriige zur Kenntniss der Tetradentheilungen. Jahrb. wiss. 



Bot. Bd. 35, S. 627. 

 KiHARA, H. (1920) tJber cytologiscbe Studien bei einigen Getreide-arten. Mitteilung 



I. But. Mag. Tokyo, vol. 32, p. 17. 



(1921) i'ber cytologiscbe Studien bei einigen Getreide-arten. Mitteilung III. 



Bot. Mag. Tokyo, vol. 35, p. 17. 



KmVADA, Y. (1919) Die Chromosomenzahl von Zea Mays L. Journ. Coll. of Sci. 

 Tokyo Imp. Univ. vol. 39, Art 10. 



