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Validation of SSR markers linked to null kunitz tryspin inhibitor allele in Indian soybean [Glycine max (L.) Merr.] population

  • Anita Rani
  • Vineet Kumar
  • Vaishali Mourya
  • R. K. Singh
  • S. M. Husain
Original Article

Abstract

Kunitz trypsin inhibitor, a proteinaceous antinutritional factor present in soybean seeds, is responsible for inferior nutritional quality of raw soybean and incompletely processed soy products. The objective of the present investigation was to validate the SSR markers (Satt228 and Satt409) reported to be linked to Ti locus in an Indian soybean population generated from the cross between soybean cultivar LSb1 (TiTi) and PI542044 (titi). Parental polymorphism was surveyed using Satt409, Satt228 and 5 SSR markers in the neighbouring genomic region of Ti locus. A portion of the cotyledon of F2 seeds was used for analyzing the presence or absence of kunitz trypsin inhibitor polypeptide electrophoretically while the remaining portion containing the embryo was used for raising the F2 plants (104) for the development of mapping population. The SSR marker Satt228 reported to be tightly linked with Ti locus was not found to be polymorphic for the parents used in our study. Satt409 was found to be linked with Ti locus at 4.7 cM. Besides, a new marker Satt538 was found to be linked with Ti locus at a distance of 17.8 cM. Thus, the SSR marker Satt409 can be useful for Marker Assisted Selection for transferring titi allele in the background of Indian soybean genotypes.

Keywords

Kunitz trypsin inhibitor Soybean SSR markers Ti locus 

Abbreviations

SSR

Simple sequence repeat

KTI

Kunitz trypsin inhibitor

LOD

Log of odds

PAGE

Polyacrylamide gel electrophoresis

MAS

Marker assisted selection

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Copyright information

© Society for Plant Biochemistry and Biotechnology 2011

Authors and Affiliations

  • Anita Rani
    • 1
  • Vineet Kumar
    • 1
  • Vaishali Mourya
    • 1
  • R. K. Singh
    • 2
  • S. M. Husain
    • 1
  1. 1.Directorate of Soybean Research (ICAR)IndoreIndia
  2. 2.Indian Institute of Sugarcane ResearchLucknowIndia

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