Volume 61 Number 4 Article 25 Pages: 170-173
Year 2007 Month 10
Title: 'Sooyoung': A Mid-Season Pear (Pyrus pyrifolia Nakai) Cultivar With High Soluble Solids and Medium Size
Authors: I.S. Shin, H.S. Hwang, Y.U. Shin and W.C. Kim
Citation
Abstract:
'Sooyoung' pear (Pyrus pyrifolia Nakai) originated from a cross between ‘Niitaka’ and ‘Soohwangbae’ made
in 1989 at the National Horticultural Research Institute of the Rural Development Administration in Korea.
It
was first selected as ‘89-24-6’ in 1994 for its high fruit quality with good eating characteristics for a mid-season
cultivar.
After regional adaptability tests at 10 sites for 8 years from 1999 to 2006 as 'Wonkyo Na-36', it was named
in 2006. It blooms three days later than 'Niitaka', a leading pear cultivar in Korea. 'Sooyoung' is medium in tree
vigor and upright-spreading in tree habit. 'Sooyoung' is classified as susceptible to pear scab (Venturia nashicola)
like ‘Niitaka’. ‘Sooyoung’ is pollen incompatible with 'Hanareum' but it is cross-compatible with ‘Niitaka’ and
‘Wonwhang’. The optimum harvest time of ‘Sooyoung’ was Sept. 30, 8 days earlier than 'Niitaka'. The fruit is
roundish oblate in shape and bright yellowish green in skin color.
Average fruit weight is 429 g and soluble solids
content is 15.0oBrix.
The fruit flesh juiciness is medium-high and it has negligible grit.
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