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Euphytica

, Volume 152, Issue 3, pp 361–366 | Cite as

SSR marker tightly linked to the Ti locus in Soybean [Glycine max (L.) Merr.]

  • Myung Sik Kim
  • Min Jung Park
  • Woo Hyeun Jeong
  • Ki Chul Nam
  • Jong Il Chung
Article

Abstract

Soybean is a major source of protein meal in the world. Soybean kunitz trypsin inhibitor (SKTI) protein is a responsible for the inferior nutritional quality of unheated or incompletely heated soybean meal. The primary objective of this research was to identify DNA markers linked to the Ti locus controlling presence and absence of kunitz trypsin inhibitor protein. Two mapping populations were developed. Population 1 was derived from a cross between cultivar Jinpumkong2 (TiTi) and C242 (titi). Population 2 was made from a mating between cultivar Clark (TiTi) and C242. The F1 plants were grown in the greenhouse to produce F2 seeds. Each F2 seed from F1 plants was analyzed electrophoretically to determine the presence of the SKTI protein band. One-thousand RAPD primers, 342 AFLP primer sets, and 35 SSR primers were used to map Ti locus in population 1 and 2. The presence of SKTI protein was dominant to the lack of a SKTI protein and kunitz trypsin inhibit protein band was controlled by a single locus. Twelve DNA markers (4 RAPD, 4 AFLP, and 3 SSR) and Ti locus were found to be genetically linked in population 1 consisted with 94 F2 individual plants. Three SSR markers (Satt409, Satt228, and Satt429) were linked with Ti locus within 10 cM. Satt228 marker was tightly linked with Ti locus. Satt228 marker was tightly linked within 0–3.7 cM of the Ti locus and may be useful in a marker assisted selection program.

Keywords

Kunitz trypsin inhibitor Molecular marker Soybean SSR marker Ti locus 

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Notes

Acknowledgment

This work was supported by a grant (CG 3122) from Functional Genomics Center (CFGC), 21C Frontier R & D Project, Ministry of Science & Technology, Korea.

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Copyright information

© Springer Science+Business Media B.V. 2006

Authors and Affiliations

  • Myung Sik Kim
    • 1
  • Min Jung Park
    • 1
  • Woo Hyeun Jeong
    • 1
  • Ki Chul Nam
    • 1
  • Jong Il Chung
    • 1
  1. 1.Department of Agronomy, Research Institute of Life ScienceGyeongsang National UniversityChinjuKorea

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