Karyotypic Variability in Experimental Diploid and Triploid Hybrids of Aloe vera*A. saponaria

Nonadditive gene expression in diploid and triploid hybrids of maize.

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...

Simultaneous formation of haploid, diploid and triploid eggs in diploid-triploid mosaic loaches

Karyotypic Variation of the Aloe vera L. and Aloe littoralis Baker in Iran

Background: We describe karyotypic variations and the in vitro methods for plant propagation and conservation as well as detailed chromosomal analysis of (Aloe vera L.) and Aloe littoralis from Iran during flowering stage. Objectives: This karyotypic was discovered because of a difference in the position of the chromosome and due to genomic differentiation in domesticated pop...

Karyotypic Analysis of Diploid or Near Diploid Metastatic

The hypothesis of tumor progression proposed by Nowell (P. C. Nowell, Science (Wash. DC), 194: 23-28, 1976] states that one mecha nism for the development of the metastatic phenotype could be the induction of chromosomal instability. We have developed a new experi mental system for studying the induction of the metastatic phenotype using early passage fibroblasts which become metastatic in nude...

Spontaneous Chromosome Aberrations in Triploid Tradescantia Hybrids.

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...