ISHS Acta Horticulturae 713: VI International Peach Symposium
INBREEDING OF THE MAJOR COMMERCIAL FRESH MARKET PEACH CULTIVARS GROWN IN SOUTHERN BRAZIL |
| Authors: | D.H. Byrne, M.C. Bassols Raseira |
| Keywords: | Prunus persica, low chilling, non-melting, melting, low acid, coancestry, genetic relationships |
| Abstract:
The Brazilian breeding programs have released a wide range of peach cultivars adapted to the low and medium chill zones over the last 50 years for both the fresh and processing markets. An inbreeding analysis of the 11 most important commercial peach cultivars used in southern Brazil indicated a very low level of inbreeding among these cultivars. With both the Case I (all open pollinations are crosses to unrelated parents) and the Case II (all open pollinations are self pollinations) assumptions, the average inbreeding coefficients are less than half that reported for the peach and nectarine cultivars from the University of Florida breeding program and much less than half that reported for the major commercial peach cultivars used in the Eastern United States. These varieties represent both melting and non melting flesh, yellow and white flesh, and high and low acid types. Among the parentage seen in this collection are local varieties such as ‘Delicioso’, ‘Aldrighi’, ‘15 de Novembro’, ‘Preludio’, and ‘Guaderio’, North American varieties such as ‘Babcock’, ‘Panamint’, and ‘Nectared#5’, and germplasm from the Florida and New Jersey breeding programs. | |
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