Locus Interactions Underlie Seed Yield In Soybeans Resistant toHeterodera glycines

doi:10.21775/cimb.011.i73

Abstract

The objective of this analysis was to identify linkats in genomic regions underlying seed yield and root SCN resistance QTL. Used were groups of cultivars selected from a single recombinant inbred (RIL) population

Highlights

Soybean [Glycine max (L.) Merr.] is one of the world’s major crops (Singh and Hymowitz, 1999) grown commercially for its oil (16%) and protein content (42%)
In Williams by Essex there were more recombination events and smaller linkats on linkage group (LG) K among high yielding cultivars compared to the population as a whole (Stephaniak et al, 2005)
Linkage group I did not differ in linkat size or recombination events in that study

Summary

Introduction

Soybean [Glycine max (L.) Merr.] is one of the world’s major crops (Singh and Hymowitz, 1999) grown commercially for its oil (16%) and protein content (42%). Breeders have struggled to combine high seed yield with resistance to soybean cyst nematode (SCN; caused by Heterodera glycines I.) due to linkage drag and other unknown factors (Mudge et al, 2001; Yuan et al, 2002; Concibido et al, 2004; Kopisch-Obuch et al, 2005). In contrast high seed yield has been readily combined with resistance to diseases like soybean sudden death syndrome (SDS; Hnetkovsky et al, 1996; Meksem et al, 1999; Prabhu et al, 1999; Iqbal et al, 2001). Simple selection of loci for SCN resistance combined with high seed yield has not eliminated the negative relationship between the traits when cyst pressure is low

Objectives

Methods

Results

Conclusion