Image Archives

Amerikaasagao Ipomoea hederacea (=Pharbitis hederacea)

Inheritance of leaf form

Copyright 1998-2017 Yoshiaki Yoneda

When a Hederacea leaf type and a cordate leaf type of Ipomoea hederacea were crossed, the F1 plant (center of figure) was a Hederacea leaf. Segregation at a ratio of 3 to 1 between Hederacea leaf and cordate leaf was observed in the F2 generation. Because Ipomoea hederacea is early flowering and early fruiting, if we sow in early spring and stimulate flowering by dark treatment, we can study the segregation ratio of F2 by November.

Slide No. 163

1 x 1

4 x 4

2 x 2

lens 8 x 8

16 x 16

1 x 1 (thumbnail images) : For indexing
2 x 2, 4 x 4, 8 x 8 : For viewing on monitor
8 x 8, 16 x 16 : For printing

Edited by Yuuji Tsukii (Lab. Biology, Science Research Center, Hosei University)