Population Genetics, Lethal Yellowing Disease, and Relationships among Mexican and Imported Coconut Ecotypes

Simple item page
dc.contributor.authorDaniel Zizumbo-Villarreal
dc.contributor.authorMariana Ruiz-Rodriguez
dc.contributor.authorHugh Harries
dc.contributor.authorPatricia Colunga-GarciaMarin
dc.date.accessioned2014-05-15T05:17:31Z
dc.date.available2014-05-15T05:17:31Z
dc.date.issued2006-11-21
dc.description.abstractLethal Yellowing (LY) is one the main diseases affecting coconut worldwide, making the research for resistant germplasm vital to production. Study objectives were to: (i) estimate diversity and genetic structure within four commercial Mexican ecotypes and five imported ecotypes; (ii) analyze the genetic relationships between Mexican ecotypes and the main coconut gene pools identified worldwide; and (iii) measure the correlation between the genetic distance among these ecotypes and Malayan Yellow Dwarf and their percentage mortality due to LY. The Mexican pool had high genetic diversity ( pl594; HT 5 0.34 6 0.02) similar to that of the populations imported from the world’s main gene pools ( pl 5 94; HT 5 0.36 6 0.01). Both molecular variance and Wright’s index of differentiation indicated strong differentiation among Mexican ecotypes (FST 5 0.32) despite significant gene flow (Nm 5 1.4 to 5.6). UPGMA analysis and exact tests of differentiation suggested that the Indo-African gene pool is found along the Caribbean and Gulf of Mexico coasts, while the Asian- Pacific pool is found on the Pacific coast. High positive correlations were found between genetic distance and LY mortality percentages under severe incidence conditions during 9- and 14-yr periods (r 2 5 0.80; P 5 0.02; r 2 5 0.78; P 5 0.04), suggesting that genetic distance may be useful for the estimation of the potential LY mortality in regions as yet unaffected and identification of potential parents for LY resistance breeding.en_US
dc.identifier.citationCrop Science, Vol. 46, November–December 2006en_US
dc.identifier.urihttp://hdl.handle.net/123456789/1255
dc.language.isoenen_US
dc.publisherCrop Science Society of Americaen_US
dc.titlePopulation Genetics, Lethal Yellowing Disease, and Relationships among Mexican and Imported Coconut Ecotypesen_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Population genetics, lethal yellowing disease, and relationships among Mexican and imported coconut ecotypes.pdf
Size:
218.37 KB
Format:
Adobe Portable Document Format
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Coconut