Instability of the Ploidy Level in Autotetraploid Sorghum Plants from a Line with Variable Male Fertility View Full Text


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Article Info

DATE

2002-05

AUTHORS

M. I. Tsvetova, L. A. Elkonin

ABSTRACT

It was found that, in some of the plants in generations C1–C5 of induced tetraploids in the semisterile sorghum line AS-1-30, more than 30% of pollen grains (PGs) have sizes typical of haploid PGs. Pollen of these plants was used to pollinate different lines of sorghum with cytoplasmic male sterility (CMS). Diploid hybrids were obtained, which confirms the presence of haploid PGs in the tetraploids studied. When tetraploid plants with an increased frequency of haploid PGs were pollinated with pollen of plants from fertile diploid lines, diploid hybrids were also obtained. This demonstrates that the tetraploids studied had haploid egg cells. In generation C4, a chimeric plant was found; one of its shoots was diploid (judging from morphological characters) and produced as many as 99% of haploid PGs. It is assumed that haploid gametes in autotetraploids are formed through somatic reduction of chromosomes at different ontogenetic stages. More... »

PAGES

526-530

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1023/a:1015591214297

DOI

http://dx.doi.org/10.1023/a:1015591214297

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1030629525


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