A putative advantage of allopolyploidy is the possibility of differential selection of duplicated (homeologous) genes originating from two different progenitor genomes. In this note we explore this hypothesis using a high throughput, SNP-specific microarray technology applied to seed trichomes (cotton) harvested from three developmental time points in wild and modern accessions of two independe...

Single-celled cotton fiber (Gossypium hirsutum) provides a unique experimental system to study cell elongation. To investigate the role of the actin cytoskeleton during fiber development, 15 G. hirsutum ACTIN (GhACT) cDNA clones were characterized. RNA gel blot and real-time RT-PCR analysis revealed that GhACT genes are differentially expressed in different tissues and can be classified into fo...

The goal of the current study was to assess possibility interspecific hybridization for transfer jassid-resistant genes from two wild cotton species Gossypium armourianum (Kearney (2n=2x=26) D2A) and Gossypium gossypoides (Standley (2n=2x= 26) D6) into genotypes cultivated hirsutum. demonstrated that seeds were successfully produced crosses between G. hirsutum armourianum using t...

The reniform nematode (Rotylenchulus reniformis Linford & Oliveira) is an important problem in U.S. cotton, and all cultivars support high R. reniformis populations. The objectives of this research were to find better sources of resistance to R. reniformis than are known within G. hirsutum L. and G. barbadense L. and to determine if any of these sources are also resistant to the root-knot nemat...

Root-knot nematode (RKN) resistance introgression into tetraploid cotton (Gossypium spp.) and its ancestral genome origin were examined. Resistance sources (‘Acala NemX’, ‘Clevewilt 6’, Auburn 623 RNR) were compared with diverse germplasm using simple sequence repeat (SSR) markers from chromosomes 7, 11, and 14 and DNA sequence information. Differences (P < 0.05) were observed for mean root gal...