CHROMOSOME BEHAVIOR IN TRIPLOID PETUNIA HYBRIDS
نویسندگان
چکیده
منابع مشابه
Chromosome Behavior in Fertile Triploid Aster Hybrids.
HE sterility of triploids and other unbalanced polyploids is generally conT ceded to be a consequence of irregularities in the distribution of univalents and multivalents at meiosis. Occasional viable gametes are produced, however, because of nonrandom orientation and segregation of chromosome associations. Thus, SATINA and BLAKESLEE (1937a, b) found a higher frequency of n and 2n chromosome nu...
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T HAS recently been found that chromosome aberrations of the types I induced by various kinds of radiations occur spontaneously during the development of the pollen grains in diploid species and especially in species hybrids of Tradescantia (GILES 1940). The present studies have shown that the frequency of these aberrations is even higher in triploid Tradescantia hybrids. Furthermore, it has be...
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The molecular basis of hybrid vigor (heterosis) has remained unknown despite the importance of this phenomenon in evolution and in practical breeding programs. To formulate a molecular basis of heterosis, an understanding of gene expression in inbred and hybrid states is needed. In this study, we examined the amount of various transcripts in hybrid and inbred individuals (B73 and Mo17) to deter...
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ژورنال
عنوان ژورنال: American Journal of Botany
سال: 1932
ISSN: 0002-9122
DOI: 10.1002/j.1537-2197.1932.tb09653.x