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Experimental production of 2n pollen in diploid forms of sugarbeet



Experimental production of 2n pollen in diploid forms of sugarbeet



Sel' skokhozyaistvennaya Biologiya (2): 46-47



Reproductive shoots of the 2x variety Yaltushkovskaya Odnosemyannaya were treated at the flower bud stage for 20 min with ultraviolet light ( lambda = 280 nm) and then selfed. Of 100 second-generation plants analysed, 2 had unusually large pollen grains. At the second division of meiosis in these plants both spindles had a parallel orientation; at anaphase II, 18 chromosomes rather than 9 separated to each pole, resulting in microspore dyads each containing 18 chromosomes.

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