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Abstract. Hybrid lethality expressed in the interspecific hybrid of Nicotiana suaveolens Lehm. N. tabacum L. cv. Hicks-2 is one of the mechanisms for reproductive isolation and it is temperature-sensitive. Apoptotic changes were detected in the cells of hybrid seedlings and calli expressing lethality at 28C but not under high-temperature conditions (36C), when the lethality is suppressed. Condensation...
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