Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Enhanced Seed Development in the Progeny from the Interspecific Backcross (Fagopyrum esculentum ${\times}$ F. homotropicum) ${\times}$ F. esculentum

  • Shin, Dong-Hoon (Dept. of Crop Science, Chungbuk National University) ;
  • Kamal, A H M (Dept. of Crop Science, Chungbuk National University) ;
  • Yun, Young-Ho (Department of Crop Science, National Institute of Highland Agriculture) ;
  • Bae, Jeong-Sook (Dept. of Crop Science, Chungbuk National University) ;
  • Lee, Yun-Sang (Division of Crop Science, Chungbuk Province Agricultural Research and Extension Services) ;
  • Lee, Moon-Soon (Industrial Plant Science & Technology, Chungbuk National University) ;
  • Chung, Keun-Yook (Dept. of Agricultural Chemistry, Chungbuk National University) ;
  • Woo, Sun-Hee (Dept. of Crop Science, Chungbuk National University)
  • Published : 2009.06.30
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Abstract

To facilitate the introgression of F. esculentum into the traits of F. homotropicum, several accessions of the hybrids between these two species were pollinated with F. esculentum as the recurrent parent. The embryo in vitro rescue was performed to increase the recovery of backcross progenies. The $F_{2}$ generation was more amenable than $F_{1}$ hybrids to produce backcross progenies. The $F_{1}$ hybrids were backcrossed twice with common buckwheat (pin-type F. esculentum) (recurrent backcrossing). Also, alternate backcrosses with common buckwheat and F. homotropicum (congruity backcrossing) were carried out. Pollen tube growth of BC$F_{1}$ ${\times}$ F. esculentum (thrum) and F. homotropicum ${\times}$ BC$F_{1}$ was the disturbed penetration exceeded for all initial interspecific hybrids, and its requirement was proportionally lower when the common buckwheat was used as the recurrent parent and as the last parent of congruity hybrids. Effects of both common buckwheat and F. homotropicum on seed success rate for hybridization were observed. Growth of hybrid embryos before rescue, regeneration of mature hybrids all increased recurrent and congruity backcrosses and inter-crosses between $F_{1}$ plants and selected fertile plants of the second congruity backcrosses.

Keywords

References

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