ISSN:
1615-6110
Keywords:
Fagaceae
;
Castanea
;
Chestnut Selections
;
New Zealand
;
origin
;
relationships
;
graft failure
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Abstract Graft failure that occurs in the clonal propagation of chestnuts is a practical problem which has arisen in recent years. Several hypotheses have been put forward to explain reasons for the failure but none have focused on origin and relationships of cultivars. This study was carried out to determine whether relationships of New Zealand chestnut selections and their origin reflect patterns of graft failure within the selections. Two different character data sets, random amplified polymorphic DNA (RAPD) and morpho-nut, were employed for the analyses of the relationships between the chestnut selections. Four different analyses were done to generate trees depicting the relationships of the selections. These were: morpho-nut character, RAPD character, taxonomic congruence (combination of morpho-nut and RAPD trees), and character congruence (combination of morpho-nut and RAPD data sets). When graft failure data were mapped onto the majority rule consensus tree constructed from character congruence analysis, it was found that self graft incompatibility was reflected in the origin and relationships of the chestnut selections. Information on the affinities of the chestnut selections to introduced chestnut species showed that the selections that were mostly implicated in graft failure which are from the North Island had affinities with theCastanea crenata species. But the selections (from the South Island) that were placed withCastanea sativa as well as hybrids (“1002” and “1007” from the North Island) ofCastanea mollissima andC. crenata had no failed grafts. This finding indicates that graft failure in New Zealand chestnut selections does not occur by chance but is dependent on the origin and/or evolutionary history of the selections.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01089227
Permalink
