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Monosomics in Soybean

Origin, Identification, Cytology, and Breeding Behavior

Dept. of Crop Sciences, Univ. of Illinois, 1102 South Goodwin Ave., Urbana, IL 61801 USA

View larger version (21K): [in a new window]   Fig. 1 Meiotic pairings at Metaphase I and chromosome distributions at Anaphase I in the pollen mother cell (PMCs) of monosomics in soybean. (A) A PMC with 19 II + 1 I (arrow) in mono-6. (B) An anaphase I PMC showing 19:20 chromosome distribution in mono-6. Bar represents 10 µm

View larger version (29K): [in a new window]   Fig. 2 Pollen grains of disomics and monosomics in soybean. (A) Pollen grains of a disomic plant of mono-6 (control). (B) Pollen grains of mono-3 (notice three fully stained pollen grains). Bar represents 100 µm

View larger version (21K): [in a new window]   Fig. 3 Somatic chromosomes of the progenies of monosomics in soybean. (A) A metaphase cell with 2n = 39 chromosomes from selfed population of mono-3. (B) A metaphase cell with 2n = 39 + 1 acrocentric chromosome (arrow) from selfed population of mono-6. Bar represents 10 µm