Search Results

You are looking at 1 - 10 of 1,454 items for :

  • genetic diversity x
  • Refine by Access: All x
Clear All
Free access

Joseph C. Kuhl and Veronica L. DeBoer

( Jubrael et al., 2005 ; Parks and Moyer, 2004 ; Parks et al., 2006 ). AFLP analysis has been shown to excel at estimating genetic diversity compared with morphological traits ( Roy et al., 2004 ). The objective of this study was to apply the AFLP

Free access

Timothy A. Rinehart, Brian E. Scheffler, and Sandra M. Reed

have been identified (Glyn Church, personal communication). The objectives of this study were to examine ploidy levels of Dichroa selections, evaluate the genetic diversity within the available Dichroa germplasm, determine if naturally occurring

Open access

Rita de Cássia Félix Alvarez, Aline Cordeiro Taveira, Sebastião Ferreira de Lima, Larissa Pereira Ribeiro Teodoro, Job Teixeira de Oliveira, Adriano dos Santos, Erina Vitório Rodrigues, Gessi Ceccon, and Paulo Eduardo Teodoro

better agronomic traits of commercial interest. Therefore, genetic diversity studies are necessary to assist breeders in determining the most promising hybrid combinations ( Ribeiro et al., 2019 ; Santos et al., 2014 ). In addition to grain yield, other

Open access

Joanne A. Labate

Vegetable producers require an abundance of genetic diversity to remain competitive and meet increasing consumer demands for the beneficial vitamins, minerals, dietary fiber, and other nutrients provided by these crops. Access to germplasm for

Free access

Hussam S.M. Khierallah, Saleh M. Bader, Michael Baum, and Alladin Hamwieh

sanctions imposed on Iraq have negatively affected both the production and natural genetic diversity of the crop in Iraq and inhibited the much-needed impetus to rebuild the date palm industry. Development of suitable DNA molecular markers for this crop may

Free access

Yiqun Weng

genes into elite cultivated germplasm, it is necessary to understand the genetic diversity and phylogenetic relationships among wild and cultivated Cucumis species. The objective of this study was to assess genetic variation among C. metuliferus

Free access

Xiaoxu Yang, Yinshan Guo, Junchi Zhu, Zaozhu Niu, Guangli Shi, Zhendong Liu, Kun Li, and Xiuwu Guo

genetic diversity and population structure in Vitis species. Huang et al. (2011) used 145 SSR primer pairs to compare the loci of ‘Cabernet Sauvignon’ ( Vitis vinifera ) and ‘Riesling’ ( V. vinifera ) grapevines, with the results showing that 70 loci

Free access

Yuan Zhang, Chen Wang, HongZheng Ma, and SiLan Dai

morphometric criteria, but very little work has been performed on the molecular characterization of the chrysanthemum genome. It is therefore necessary to develop and use tools to evaluate the genetic diversity among chrysanthemum cultivars to promote the

Free access

K.M. Aradhva, F. Zee, and R.M. Manshardt

Fifty-six accessions involving five taxa of Nephelium (N. Iappaceum varieties lappaceum and pallens, N. hypoleucum, N. ramboutan-ake, and N. cuspidatum) were fingerprinted and evaluated for genetic diversity using isozyme polymorphism. All five taxa were polymorphic for most of the enzymes encoded by 10 putative loci. Number of alleles per locus ranged from three for Pgi-1 to nine for Pgi-2 with a total of 57 alleles. Thirty-eight accessions out of 56 possessed unique isozyme genotypes, indicating a high level of diversity in the collection. On average, 80% of the loci were polymorphic and the expected and observed heterozygosities were 0.374 and 0.373, respectively. The cluster analysis of the isozyme data revealed five distinct clusters representing the five taxa included in the study. Genetic differentiation within N. Iappaceum var. Iappaceum was evident from the cluster analysis. Isozyme data indicated that N. ramboutan-ake is the closest relative of N. Iappaceum var. Iappaceum, followed by N. hypoleucum, N. Iappaceum var. pallens, and N. cuspidatum. Interestingly, the varieties of N. Iappaceum exhibited genetic divergence far beyond that of the congenerics, N. hypoleucum and N. ramboutan-ake and may require a taxonomic revision.

Open access

Beibei Li, Xiucai Fan, Ying Zhang, Chonghuai Liu, and Jianfu Jiang

pool of the wild relatives to enhance stress resistance. Traditionally, the methods used for assessing the genetic diversity and relationships among wild grape species have relied mostly on morphology, palynology, and isoenzymes ( Chao and Niu, 1981