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Chromosoma
Putiievsky, E., Division of Forage Crops and Pasture, Neve Ya'ar Experiment Station, Haifa Post, Israel
Katznelson, J., Division of Forage Crops and Pasture, Neve Ya'ar Experiment Station, Haifa Post, Israel
Chromosome counts have been done in 12 species of Trifolium, closely related to T. alexandrinum L., and the chiasma frequency in meiosis, pollen fertility, and seedset upon selfing was estimated. In all species, the basic number of chromosomes was 2 n=16 arranged in eight bivalents. Two species, T. salmoneum Mout, and T. berytheum Boiss., have 0-7 B-chromosomes in eight out of nine plants examined. The frequency of B-chromosomes was somewhat correlated with pollen fertility. Chiasma frequency ranged between 10.8 and 16.1 per cell with specific and ecotypic differentiation. Except for T. alexandrinum, the species analyzed were completely (or, in a few cases, highly) self-incompatible. © 1970 Springer-Verlag.
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Chromosome number and genetic system in several Trifolium species related to T. alexandrinum
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Putiievsky, E., Division of Forage Crops and Pasture, Neve Ya'ar Experiment Station, Haifa Post, Israel
Katznelson, J., Division of Forage Crops and Pasture, Neve Ya'ar Experiment Station, Haifa Post, Israel
Chromosome number and genetic system in several Trifolium species related to T. alexandrinum
Chromosome counts have been done in 12 species of Trifolium, closely related to T. alexandrinum L., and the chiasma frequency in meiosis, pollen fertility, and seedset upon selfing was estimated. In all species, the basic number of chromosomes was 2 n=16 arranged in eight bivalents. Two species, T. salmoneum Mout, and T. berytheum Boiss., have 0-7 B-chromosomes in eight out of nine plants examined. The frequency of B-chromosomes was somewhat correlated with pollen fertility. Chiasma frequency ranged between 10.8 and 16.1 per cell with specific and ecotypic differentiation. Except for T. alexandrinum, the species analyzed were completely (or, in a few cases, highly) self-incompatible. © 1970 Springer-Verlag.
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