Articles
Stability analysis and relationships between traits reveal specific and general adaptability of California varieties/selections from Regional Variety Trials in almond
Article number
1406_8
Pages
51 – 58
Language
English
Abstract
Almond (Prunus dulcis) is the most significant tree nut produced in the United States.
Since the 1970s Regional Variety Trials carried out by UC researchers and funded by the Almond Board of California have been a mechanism to test and evaluate performance of newer varieties and selections from both private and public breeding programs, across diverse growing regions in the state of California.
The current Regional Variety Trial was planted in the winter of 2014 in replicated blocks in Madera, Stanislaus, and Butte counties.
Stability and yield performance was analyzed for 29 varieties/selections across the three locations.
Relationships between post-harvest quality traits such as percent sealed shells, kernel weight, and kernel mass/kernel + shell mass (crack-out percent) were evaluated.
Percent sealed shells was negatively correlated (r=-0.55, p=0.001) with kernel mass/kernel + shell mass, and navel orange worm damage (r=-0.66, p<0.00). In-shell weight was positively correlated (r=0.59, p>0.00) with growing degree days.
These results can benefit the almond community by guiding breeders in making selection decisions, and specialists, advisors, and growers on whether the cultivars have specific or general adaptability to production environments.
Since the 1970s Regional Variety Trials carried out by UC researchers and funded by the Almond Board of California have been a mechanism to test and evaluate performance of newer varieties and selections from both private and public breeding programs, across diverse growing regions in the state of California.
The current Regional Variety Trial was planted in the winter of 2014 in replicated blocks in Madera, Stanislaus, and Butte counties.
Stability and yield performance was analyzed for 29 varieties/selections across the three locations.
Relationships between post-harvest quality traits such as percent sealed shells, kernel weight, and kernel mass/kernel + shell mass (crack-out percent) were evaluated.
Percent sealed shells was negatively correlated (r=-0.55, p=0.001) with kernel mass/kernel + shell mass, and navel orange worm damage (r=-0.66, p<0.00). In-shell weight was positively correlated (r=0.59, p>0.00) with growing degree days.
These results can benefit the almond community by guiding breeders in making selection decisions, and specialists, advisors, and growers on whether the cultivars have specific or general adaptability to production environments.
Authors
G.M. Sideli, T. DeJong, S. Saa, B. Lampinen, L. Milliron, P. Gordon, R. Duncan, T.M. Gradziel
Keywords
multi-environmental trials, yield
Groups involved
Online Articles (66)