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Aneuploids in Safflower 1
Author(s) -
Estilai A.,
Knowles P. F.
Publication year - 1980
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/cropsci1980.0011183x002000040024x
Subject(s) - carthamus , biology , ploidy , chromosome pairing , chromosome , botany , metaphase , genetics , gene , traditional medicine , medicine
Triploids found in populations of autotetraploids of cultivated safflower ( Carthamus tinctorius L.) were assumed to be products of outcrosses to diploid plants during the previous generation. The progenies of open‐pollinated triplolds had 2n=24, 25, 26, 46, 47, and 48 chromosomes. The plant with 25 chromosomes was a primary trisomic whose PMCs showed 12 bivalents plus one univalent or 11 bivalents plus one trivalent at metaphase I. The plant with 26 chromosomes was considered to be a double trisomic of a 2n + 1 + 1 type which showed chromosome associations of 12II + 2I, llII + lIII + lI, and 10II+ 2III. The expected frequencies of one trivalent in the 2n + 1 plant and two trivalents in the 2n + 1 + 1 plant were compared with their respective observed values.