Fruit Research Division, National Institute of Horticultural and Herbal Science1
Department of Horticultural Science, Yeungnam University2
Rural Development Administration3
Pear Research Institute, National Institute of Horticultural and Herbal Science4
To improve the breeding efficiency of oriental pear, heritability, correlation and frequency distribution of fruit ripening date were analyzed using 4,035 seedlings obtained from 15 families between 13 parental cultivars. Although variation of fruit ripening time was higher in most early-ripening parental cultivars than in late-ripening parental cultivars, according to analysis of average, standard deviation, and coefficient of ripening variation for ten years, fruit ripening time obtained from all parental cultivars was inherited narrower and more stable variation than others fruit trait, with 0.92-3.41 in coefficient of variation. The heritability of fruit ripening time was calculated to be over 0.8 in almost all crosses and average fruit ripening time of seedlings from cross combinations could be predicted based on that of the parental cultivars due to its superior heritability relative to other fruit traits. The average ripening time was earlier than the mid-parental value in families obtained from cross combinations using at least one late-ripening cultivar as parent, indicating that the early-ripening trait was more likely to be dominant compared to the late-ripening trait. By contrast, average ripening time was clustered in families of crosses not only between mid-season and early-season cultivars, but also between mid-season and mid-season cultivars. There was highly significant relationship (at 0.68) between mid-parental and progeny mean fruit ripening time. The correlation between fruit ripening time and fruit weight was also highly positive and thus, the mid-parental fruit ripening time could be a potent criterion for indirect selection of fruit weight.
1. Abe, K., Y. Sato, T. Saito, A. Kurihara, and K. Kotobuki.1993a. Inheritance of ripening time of fruit of Japanese pear (Pyrus pyrifolia Nakai). Jpn. J. Breed. 43:289-298.
2. Abe, K., Y. Sato, T. Saito, A. Kurihara, and K. Kotobuki.1993b. Genetic correlation between ripening time and weight of fruits in Japanes pear (Pyrus pyrifolia Nakai). Jpn. J. Breed. 43: 439-447.
3. Anderman, D. C. 1939. Apple breeding; Inheritance and statistical studies on the fruits of crossbred seedling with Antonoyka parentage. Proc. Am. Soc. Hortic. Sci. 36:279-283.
4. Brown, A. G. 1960. The inheritance of shape, size and season of ripening in progenies of the cultivated apple. Euphytica 9:327-337.
5. Haniuda, T., Y. Yoshida, and S. Tsuchiya. 1975. Studies on the inheritance of fruit characters of apple. I. Inheritance of ripening season. Bull. Fruit Tree Res. Stn. C. 2:1-11.
6. Hansche, P.E., C.O. Hesse, and V. Beres. 1972a. Estimates of genetic and environmental effects on several traits in peach. J. Am. Soc. Hortic. Sci. 97:76-79.
7. Hansche, P.E., V. Beres, and H.I. Forde. 1972b. Estimates of quantitative genetic properties of walnut and their implications for cultivar improvement. J. Am. Soc. Hortic. Sci. 97:279-285.
8. Hansche, P.E., V. Beres, and R.M. Brooks. 1966. Heritability and genetic correlation in the sweet cherry. Proc. Am. Soc. Hortic. Sci. 88:173-183.
9. Hayashi, H. 1953. Inheritance of Asian pear. II. Studies on the inheritance of major characters on temperate fruits (peach, Asian pear and persimmon). Agric. Technol. Inst. Bul. E. 2:34-53.
10. Hong, K.H. 1991. Inheritance studies of major morphological and horticultural characters in pear (Pyrus pyrifolia var. culta Nakai). PhD Diss., Chonnam Natl. Univ., Gwangju, Korea.
11. Ikeda, I., T. Oohata, T. Nishida, and K. Hirose. 1975. The inheritance of some characters in Japanese persimmon (Diospyros kaki Thunb.). III. The inheritance of season of repening. Bull. Fruit Tree Res. Stn. B. 2:1-20.
12. Kim, W.C. 1985. Studies on the inheritance of major characters in Oriental pear cultivars (Pyrus pyrifolia var. culta Nakai). PhD Diss., Seoul Natl. Univ., Seoul, Korea.
13. Kiyoji, K. 1973. Research on apple breeding. Bull. Akita Fruit Tree Res. Stn. 6:1-82.
14. Korea Rural Economic Institute (KREI). 2014. Agriculture prospect 2014. p. 253.
15. Ministry for Food, Agriculture, Forestry, and Fisheries (MFAFF). 2011. Census of Agriculture Forestry and Fisheries. p. 302.
16. Rural Development Administration (RDA). 1995. Manual for agricultural investigation. Suwon, Korea.
17. Park, S.Z. 1987. Genetic breeding for crop. Kor. Natl. Open Univ. p. 257-303.
18. Schneider, G.W. 1949. Characteristics of progeny from certain apple crosses. Proc. Am. Soc. Hortic. Sci. 53:205-212.
19. Shin, Y.U., Y.J. Yim, H.M. Cho, B.W. Yae, M.S. Kim, and Y.K. Kim. 1983. Studies on the inheritance of fruit characters of oriental pear, Pyrus serotina Rehder var. culta. Res. Rept. ORD 25(Hort.):108-117.
20. Statistics Korea. 2013. Korean Statistical Information Service. http://kosis.kr/statisticsList/statisticsList_01List.jsp?vwcd= MT_ZTITLE&parentId=F#Subcont.
21. Wellington, R. and G.H. Home. 1944. The performance of seedlings derived from selfing and crossing the McIntosh apple. Proc. Am. Soc. Hortic. Sci. 44:273-279.
22. Yamaguchi, M., M. Yoshida, and H. Kyotani. 1984. Studies on the distribution of ripening time of certain progenies in peach breeding. Bull. Fruit Tree Res. Stn. A. 11:15-33.