Search Results

You are looking at 1 - 10 of 233 items for :

  • "polyploid" x
  • All content x
Clear All
Open access

Alan T. Whittemore and Zheng-Lian Xia

both urban and forested landscapes ( Pinchot et al., 2017 ). Most elm species are diploid, with 2 n = 28 ( Santamour and Ware, 1997 ). Polyploids are known in only one elm species, U. americana , with diploid and tetraploid populations known in the

Free access

Elisabeth M. Meyer, Darren H. Touchell, and Thomas G. Ranney

ornamental characteristics such as larger, longer-lasting flowers, thicker petals, and larger, thicker leaves ( Kehr, 1996 ). In addition, polyploid plants, particularly allopolyploids, can have other advantageous traits such as enhanced vigor, improved pest

Free access

Dave I. Thompson, Neil O. Anderson, and Johannes Van Staden

; Sparnaaij, 1979 ). Because naturally occurring polyploid genotypes are usually unavailable for breeding programs, polyploidy is typically induced through mitotic spindle inhibition or microtubule polymerization, often by exposure to colchicine ( Caperta et

Free access

Cary J. Hebert, Darren H. Touchell, Thomas G. Ranney, and Anthony V. LeBude

) develop an efficient methodology for in vitro shoot regeneration from leaves of R . ‘Fragrantissimum Improved’; and 2) develop an oryzalin-mediated protocol for polyploid induction in ‘Fragrantissimum Improved’. Materials and Methods Plant

Free access

David M. Czarnecki II and Zhanao Deng

( Sharma et al., 2005 ). Polyploid manipulation, particularly triploid production, has been proposed as a genetic approach to develop sterile, noninvasive lantana cultivars ( Czarnecki et al., 2008 ). Similar genetic approaches (polyploid production and

Free access

Guo-Gui Ning, Xue-Ping Shi, Hui-Rong Hu, Yan Yan, and Man-Zhu Bao

and Whitton, 2000 ). The manipulation of ploidy can also be a valuable tool for plant breeding programs. Polyploids often generate variants that may contain useful characteristics and provide a wider germplasm base for breeding studies ( Ramanna and

Free access

Zhitong Li and John M. Ruter

blooming vigor and longevity. Induction of polyploid genotypes is an effective means of producing enhanced characteristics and increased sterility. In breeding ornamental plants, polyploid induction has been widely applied to enlarge plant organs ( Caporali

Full access

Jonathan D. Mahoney, Thao M. Hau, Bryan A. Connolly, and Mark H. Brand

( Dirr, 2009 ; McKay, 2001 ). Aronia flowers are thought to be protogynous and self-compatible ( Connolly, 2014 ). Polyploid Aronia species have been reported to reproduce apomictically, via gametophytic apomixis, resulting in embryos that are

Free access

Jin-Hu Wu, A. Ross Ferguson, Brian G. Murray, Alison M. Duffy, Yilin Jia, Canhong Cheng, and Philip J. Martin

ripening earlier ( Li et al., 2002 ). The reduction in fruit firmness and DM could be the result of the fruit of autotetraploids having larger cells with larger intercellular spaces; perceived flesh texture could likewise be affected. Polyploids generally

Free access

David M. Czarnecki II, Amanda J. Hershberger, Carol D. Robacker, David G. Clark, and Zhanao Deng

Caprice’. Most of the meiotic work was conducted at the University of Georgia (Athens and Griffin, GA). Results Ploidy analysis. A polyploid series was observed among the 26 commercial cultivars and six UF breeding lines analyzed for ploidy level ( Table 1