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Hypertriploid in Soybean

Origin, Identification, Cytology, and Breeding Behavior

^a Dep. of Crop Sciences, Univ. of Illinois, 1102 South Goodwin Avenue, Urbana, IL 61801 USA

View larger version (36K): [in a new window]   Fig. 1 Meiotic pairings at Metaphase I and chromosome distributions at Anaphase I in the pollen mother cell (PMCs) of soybean hypertriploid. (a) A PMC had 15 trivalents, six bivalents, and four univalents at Metaphase I. (b) A PMC had five trivalents, 15 bivalents, and 16 univalents at Metaphase I. (c) A PMC had a chromosome distribution of 30:31 at Anaphase I. (d) A PMC had a chromosome distribution of 29:31 with one lagging chromosome (indicated by an arrow) at Anaphase I. Bar represents 10 µm

View larger version (40K): [in a new window]   Fig. 2 Somatic chromosome number of the progenies of soybean hypertriploid. (a) 2n = 45 chromosomes in an F1 plant of hypertriploid x Clark 63. (b) 2n = 47 chromosomes in an F1 plant of hypertriploid x Clark 63. (c) 2n = 56 chromosomes in an F1 plant of hypertriploid x Clark 63. (d) 2n = 65 chromosomes in a plant from self-pollinated hypertriploid. Bar represents 10 µm