Phenotypic diversity within native Iranian almond (Prunus spp.) species and their breeding potential

A total of 137 accessions from 18 wild almond species were collected from Iran and leaf and fruit traits were characterized. Also evaluated were flowering and ripening date, self-incompatibility and kernel bitterness. An extensive phenotypic diversity was found both among and within species. Differe...

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Published in:Genetic resources and crop evolution Vol. 56; no. 7; pp. 947 - 961
Main Authors: Sorkheh, K, Shiran, B, Rouhi, V, Asadi, E, Jahanbazi, H, Moradi, H, Gradziel, T. M, Martínez-Gómez, P
Format: Journal Article
Language:English
Published: Dordrecht Dordrecht : Springer Netherlands 01-11-2009
Springer Netherlands
Springer Nature B.V
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Summary:A total of 137 accessions from 18 wild almond species were collected from Iran and leaf and fruit traits were characterized. Also evaluated were flowering and ripening date, self-incompatibility and kernel bitterness. An extensive phenotypic diversity was found both among and within species. Differences in average leaf dimensions among and within species were associated with average rainfall but not altitude of collection site. Adjacent accessions located in drier areas had smaller leaf dimensions than those located in semi-humid or humid regions. No relation was found between average fruit dimensions and collection site conditions. Principal component analysis revealed that the nut weight and width, and the kernel weight had highest loading in the first component accounting for 45.8% of total variation. In contrast, leaf traits in the second component accounted for 22.3% of total variation. No significant correlations were detected between leaf dimensions and fruit traits in all species evaluated. Results document a rich source of new germplasm for almond improvement programs. Small fruit size, pollen-pistil self-incompatibility, and bitter kernel flavour are the most common obstacles to the utilization of this wild germplasm in breeding.
Bibliography:http://dx.doi.org/10.1007/s10722-009-9413-7
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ISSN:0925-9864
1573-5109
DOI:10.1007/s10722-009-9413-7