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The Origin of 2n and n Sectors of Chimeral Pima Cotton Plants
Author(s) -
Turcotte E. L.,
Feaster Carl V.
Publication year - 1973
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1973.0011183x001300010034x
Subject(s) - biology , gossypium barbadense , ploidy , polyspermy , human fertilization , botany , sperm , gossypium , genetics , embryo , gossypium hirsutum , gene , oocyte
The tetraploid tissue of American Pima cotton ( Gossypium barbadense L.) plants chimeral for tetraploid and haploid tissues was found to be of hybrid origin. We crossed 57‐4, a doubled haploid that is semigametic, as female, with a multiple‐marked stock homozygous for glandless and heterozygous for red plant color. A number of the plants from this cross were chimeral for glanded or glandless tissue, red or green tissue, and tetraploid or haploid tissue. The combinations of tissues in tri‐chimeral plants were such that polyspermy appeared to be involved in the development of their tetraploid tissue. We theorized that a sperm nucleus divided in the egg cell before fertilization. The semigametic tendency of the female parent may be associated with the stimulation of divisions of the sperm nucleus.