Articles
PHENOTYPING M. SIEVERSII COLLECTIONS FROM KAZAKHSTAN FOR LEAF TRAITS AND TREE ARCHITECTURE
Article number
1058_40
Pages
335 – 341
Language
English
Abstract
Ecotypes are useful sources of rapid adaptation to new environments.
Recent collections, of the wild apple (M. sieversii) from Kazakhstan maintained in Geneva, New York, have made available populations from twelve sites in Kazakhstan representing radically different environments.
Simple sequence repeat (SSR) analysis of subpopulations from these sites indicates a high degree of diversity, with different sets of genes predominating at individual sites.
Since several geographically distinct sites report minimal annual rainfall (250-400 mm/yr), populations surviving at these sites may contain genetic changes related to enhanced water use efficiency and/or drought resistance.
These traits are composed of a complicated network of morphological and biochemical factors, all under genetic control.
We measured several common traits related to drought resistance (leaf area, stomata length and density, and tree architecture) or water use efficiency (δ13C). We report that leaf morphological traits and branch architectural traits are significantly different among ecotypes.
In addition, water use efficient individuals from the same populations could be distinguished based on their ability to discriminate against 13C.
Recent collections, of the wild apple (M. sieversii) from Kazakhstan maintained in Geneva, New York, have made available populations from twelve sites in Kazakhstan representing radically different environments.
Simple sequence repeat (SSR) analysis of subpopulations from these sites indicates a high degree of diversity, with different sets of genes predominating at individual sites.
Since several geographically distinct sites report minimal annual rainfall (250-400 mm/yr), populations surviving at these sites may contain genetic changes related to enhanced water use efficiency and/or drought resistance.
These traits are composed of a complicated network of morphological and biochemical factors, all under genetic control.
We measured several common traits related to drought resistance (leaf area, stomata length and density, and tree architecture) or water use efficiency (δ13C). We report that leaf morphological traits and branch architectural traits are significantly different among ecotypes.
In addition, water use efficient individuals from the same populations could be distinguished based on their ability to discriminate against 13C.
Publication
Authors
K. Maguylo, C. Bassett
Keywords
apple, drought tolerance, water use efficiency (WUE), stomatal size and number, δ13C
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