Determination of KTI in soybean genotypes

Abstract

Kunitz trypsin inhibitor is major antinutritive factor in soybean seed that decrease its nutritional value. Breeding programs aimed to select soybean variety without Kunitz trypsin inhibitor are of great importance as that varieties can be used directly for monogastric animal feeding. By specific markers analysis is possible to detect genotypes without KTI. Ninety sixth soybean genotypes from Soybean collection of Maize Research Institute are analyzed by two markers Satt228 and Satt409. 89 genotypes with both markers had characteristic alleles for genotypes with KTI, and three genotypes Kunitz, Laura and Lana have characteristics bands, with Satt228 alel 2 as with Satt409 band about 170kDa, for genotypes with titi recesive allele. Four genotypes which had both alleles with marker Satt228 with Satt 409 had only allele characteristic for TiTi genotype. Obtained results confirmed that both markers could be used for identification and selection genotypes without Kunitz trypsin inhibitor.

Keywords

• soybean
• Kunitz trypsin inhibitor
• molecular marker