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Aneuploids in Seedling Populations of Tetraploid Alfalfa, Medicago sativa L. 1
Author(s) -
Bingham E. T.
Publication year - 1968
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/cropsci1968.0011183x000800050019x
Subject(s) - biology , aneuploidy , medicago sativa , homologous chromosome , seedling , germination , genetics , medicago , somatic cell , botany , chromosome , gene
Frequencies of aneuploids in ‘Vernal’ and ‘Saranac’ alfalfa were 6% and 3%, respectively, at the time of seed germination. Aneuploids had 31 or 33 chromosomes, with only two exceptions. The effect of observed aneuploid frequencies on genetic ratios and estimates of double reduction was determined. These values would be only slightly affected if the aneuploidy were distributed over all eight sets of homologous chromosomes, but an erroneous double reduction estimate of 2‐5% would be obtained if one homologous set were preferentially involved. No somatic instability, accessory chromosomes, or fragments were observed in 209 plants examined.