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Breeding of Self-compatible Pear "Wonkyo Na-jasoojung 2"  

Shin, Il Sheob (Fruit Research Division, National Institute of Horticultural & Herbal Science)
Shin, Yong Uk (Fruit Research Division, National Institute of Horticultural & Herbal Science)
Hwang, Hae Sung (Pear Experimental Station, National Institute of Horticultural & Herbal Science)
Heo, Seong (Fruit Research Division, National Institute of Horticultural & Herbal Science)
Kim, Ki Hong (Fruit Research Division, National Institute of Horticultural & Herbal Science)
Kang, Sam Seok (Pear Experimental Station, National Institute of Horticultural & Herbal Science)
Kim, Yoon Kyeong (Pear Experimental Station, National Institute of Horticultural & Herbal Science)
Publication Information
Korean Journal of Breeding Science / v.41, no.2, 2009 , pp. 154-157 More about this Journal
Abstract
Pear has a gametophytic self-incompatibility (SI) system and its SI reaction is controlled by a single multi-allelic S-locus. 'Wonkyo Na-jasoojung 2' was selected from a cross between 'Wonwhang', early season major pear cultivar with high fruit quality and self-incompatible, and 92-18-79 (${S_4}^{sm}{S_4}^{sm}$) obtained from self cross of 'Osa-nijisseiki' (${S_2S_4}^{sm}$) (SM, stylar-part mutant), self-compatible bud mutant that originated from self-incompatible 'Nijisseiki' ($S_2S_4$) made in 2001 at the National Institute of Horticultural and Herbal Science, Rural Development Administration in Korea. '92-18-79' was selected as a self-compatible source through field investigation. It bloomed 1 day earlier than 'Osa-Nijisseiki' and similar to 'Wonwhang' in 2008. It is medium in tree vigor and spreading in tree habit. 'Wonkyo Na-jasoojung 2' is classified as highly susceptible to pear scab (Venturia nashicola) similar to 'Osa-Nijisseiki' and as resistant to black spot (Alternaria kikuchiana) similar to 'Wonwhang'. It had 65.7% fruiting rate by self pollination. The average optimum harvest time of 'Wonkyo Na-jasoojung 2' was 148 days after full bloom and it matured 2 days earlier than 'Osa-Nijisseiki' and 11 days later than 'Wonwhang'. The fruit is roundish oblate in shape and yellowish brown in skin color. Average fruit weight was 445 g and soluble solids content was 13.3 $^{\circ}Brix$. The flesh had abundant juice and negligible grit.
Keywords
fruit breeding; Pyrus pyrifolia; self-incompatible;
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Times Cited By KSCI : 1  (Citation Analysis)
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