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Studies on the problem of fertility in polyploids

, : Studies on the problem of fertility in polyploids. Archiv fur Zuchtungsforschung 2(1): 71-78

Of two diploid forms of Primula malacoides, one was less fertile than the other but tetraploids derived from it were more so. Hybrids between the two tetraploids were more fertile still.


Other references

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Jeschke, J.; Nekola, J.; Chlumsky, J., 1999: Doping in sports. The activities of the Czech Antidoping Committee are examined in the context of international doping controls. Data is provided to show the number of tests carried out on Czech athletes, the number of these which have tested positive, and the brea...

Wray, K.Brad., 2005: Rethinking scientific specialization. My aim in this paper is to re-examine specialization in science. I argue that we need to acknowledge the role that conceptual changes can play in the creation of new specialties. Whereas earlier sociological accounts focus on social and instrument...

Mahooti, S.; Wakely, P.E., 2006: Cytopathologic features of olfactory neuroblastoma. BACKGROUND. Olfactory neuroblastoma (ONB) is an uncommon neoplasm arising from the olfactory mucosa. Because its cytopathology is largely limited to case reports, the goal was to evaluate a series of ONB cases, compare them with previously reporte...

Takase, A.; Kai, H.; Nishida, K.; Iwakawa, T.; Ueda, K.; Masuko, M., 2000: Oxime derivative and bactericide containing the same as active ingredient. A compound represented by general formula (I) or a salt thereof, a process for producing the same, an intermediate for the production thereof, and a bactericide (fungicide) containing the same as the active ingredient wherein R1 represent optional...

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Datta, 2000: Error-systematics of determining elemental isotopic abundance ratios by the molecular ion beam method: a case study for the simultaneous isotopic analysis of lithium and boron as Li2BO2+. The simultaneous isotopic analysis of lithium and boron by the Li2BO2+ ion beam method involves measurements of two different molecular abundance ratios (say, Rj+/-delta(j) and Rk+/-delta(k)), and subsequently extensive calculations to arrive at t...