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| Title | Selection of son tra clones in North West Vietnam | | Author | Ha Van Tiep, Vu Van Thuan, Sammy Carsan, Chris Harwood, Dam Viet Bac, La Nguyen, Delia C. Catacutan and Ramni Jamnadass | | Year | 2016 | | Publisher | World Agroforestry Centre (ICRAF) | | City of Publication | Nairobi | | Series Number | Working Paper No 228 | | Number of Pages | 19 | | Call Number | WP0198-16 | | Keywords | Son tra, Docynia indica, candidate plus tree, clone, Northwest Vietnam. |
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| Abstract: |
| Son tra (Docynia indica) is an indigenous tree species widely distributed at high elevations in
northern Vietnam. Its fruit is traditionally used as a fruit and for making wine, providing a
source of income for farmers. Selection of superior planting material can enhance its market
potential and benefit growers, processors and consumers. The Agroforestry for Livelihood
Improvement (AFLI) project implemented by the World Agroforestry Centre (ICRAF) and
Forest Science Centre for Northwestern Vietnam (FSCN) is therefore promoting son tra
domestication in Dien Bien, Son La and Yen Bai provinces of North West and North Central
eco-region of Vietnam. Domestication activities involved evaluation, selection and testing of
candidate trees to identify genotypes that could be propagated as clones to give son tra
plantations with improved market potential. Key informant interviews drawn from various
sectors such as agriculture, forestry, local traders and farmers were used to identify natural
and plantation son tra populations where screening was carried out. Over 2,400 trees were
screened in 13 selected locations. Screening involved a sequence of selection processes, first
identifying 600 trees with superior fruit yield, then selecting 150 of these with superior fruit
appearance, followed by taste trials to identify 10 candidate plus trees with high fruit yield,
superior fruit morphology, fruit peeling characteristics and superior taste for fresh fruit
consumption and 20 candidate plus trees with high yield, superior fruit morphology and
suitable taste for wine production. The 30 selected trees were grafted onto seedling
rootstocks. All selections grafted well, with over 90% grafting success. Grafts of the selected
genotypes were then established in clonal field tests to evaluate their performance and
adaptability to local growing conditions. |
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