Online ISSN : 1348-7019
Print ISSN : 0011-4545
Tertiary Trisomic in Capsicum annuum L.
N. LakshmiP. Nalini
ジャーナル フリー

1989 年 54 巻 2 号 p. 395-399


A tertiary trisomic was located in the open-pollinated progeny of a second generation interchange heterozygote obtained in the progeny of a triploid Capsicum annuum for the first time. Phenotypically it was remarkable in exhibiting increased height, shortened internodes, dimorphic leaves. Meiotic studies revealed the chromosome number as 2n=25 and a maximum association was a chain of five chromosomes observed in 29.16% of cells. Meiosis was irregular with unequal separation and formation of laggards, micronuclei and polyads. Pollen fertility was reduced to 48.28%. The types and frequencies of meiotic associations formed, origin of tertiary trisomic from the interchange heterozygote and the resaons for altered morphology were discussed.

© The Japan Mendel Society
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