Hybrid Plants between Two Races of Vicia amphicarpa having 2n=10 and 2n=14 Chromosomes
1974 Volume 24 Issue 2 Pages 73-80
Details
1974 Volume 24 Issue 2 Pages 73-80
l. Karyological and cytogenetical studies were made on the interspecific hyprid between Vicia amphicarpa (called V. cordata) 2n=10 aud V.amphicarpa, true 2n=14 in order to clarify the distribution of the parental chro-mosomes in the hybrid progenies. 2. In V.amphicarpa, true, ta1 the longest subterminal chromosome which possesses a longer short-arm and the ta3 of the long chromosome which possesses a satellite con-nected to the long arm were identified. The ta6 is one of the short subterminal chromoso-mes and the ta7, the shortest submedian chro-mosome, were also identified. In V. amphicarpa (V.cordata), a2 possesses a short arm which is long compared with the other short arms of other chromosomes; a4 is the middle sub-terminal chromosome which has a long sate-1lite conneected to the long arm were the identified characteristic chromosomes. 3. In the F1, the somatic chromosome number was 2n=12, and the a2, a4, ta1, ta3, ta6 and ta7 of parental chrosomes were identified. Almost all external morphological characters of F1 were intermediate but a few other characters closely resembled to those of V.amphicarpa, true. The growth of AR×Ta F1 Plants was superior to that of Aw×Ta F1. The fertility in AR×Ta Fl was consder-ably low and sterile in the Aw×Ta F1. The chromosome conjugation at M(I) of PMCS Was loose compared with those of the other inters-pecific hybrids of V.sativa and its related species, and many univalent and multivalent chromosome conjugations were observed.
