Abstract
SUMMARYSolanum integrifolium and S. indicum var. multiflora were successfully crossed to obtain reciprocal hybrids. Chromosome pairing at diakinesis and metaphase-I was studied in them. Higher chromosome associations in the form of chains of four associated with the nucleolus were observed in low-frequency in the F-l S. integrifolium × S. indicum var. multiflora, indicating multiple homeologies for the concerned chromosomes. However, no such higher associations were observed in the reciprocal hybrid, S. indicum var. multiflora × S. integrifolium. Modal chromosome association in reciprocal hybrids was twelve bivalents per PMC indicating the retention of ancestral chromosome homeologies by the two taxa. Despite regular meiosis, reciprocal hybrids were highly sterile. Such sterility could be attributed to the segregational events of the recombined chromosomes resulting in gametic lethalities.
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