New Zealand Journal of Botany abstracts

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Transmission of B-Chromosomes in Dactylis

Elizabeth Williams
P. C. Barclay

Grasslands Division, Department of Scientific and Industrial Research, Palmerston North

Abstract In diploid and autotetraploid Dactylis glomerata ssp. lusitanica and its allo-tetraploid hybrids with D. glomerata ssp. glomerata, B-chromosomes undergo non-disjunction and preferential segregation to the generative nucleus at first pollen mitosis. This results in transmission by male gametes of double the number of B-chromosomes received by the microspore at completion of meiosis. This mechanism of numerical increase is similar to that reported for a number of other species of Gramineae. On the female side, transmission of B-chromosomes is normal.

Received 21 February 1972
New Zealand Journal of Botany 10: 573-84

PDF file of entire paper: medium quality (1477K); (scanned from paper original: notes about this process)

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