Genetic Diversity and Association Analysis for Solvent Retention Capacity in the Accessions Derived from Soft Wheat Ningmai 9

Abstract EN

Solvent retention capacity (SRC) test is an effective method for quality evaluation of soft wheat.

Ningmai 9 is a founder in soft wheat breeding.

The SRC and genotype of Ningmai 9 and its 117 derivatives were tested.

Association mapping was employed to identify the quantitative trait loci (QTL) associated with SRCs.

Ningmai 9 had the allele frequency of 75.60% and 67.81% to its first- and second-generation derivatives, respectively, indicating higher contribution than theoretical expectation.

Neighbor-joining cluster based on the genotyping data showed that Ningmai 9 and most of its first-generation derivatives were clustered together, whereas its second-generation derivatives were found in another group.

The variation coefficients of SRCs in the derivatives ranged from 5.35% to 8.63%.

A total of 29 markers on 13 chromosomes of the genome were associated with the SRCs.

There were 6 markers associated with more than one SRC or detected in two years.

The results suggested that QTL controlling SRCs in Ningmai 9 might be different from other varieties.

Markers Xgwm44, Xbarc126, Xwmc790, and Xgwm232 associated with SRCs in Ningmai 9 might be used for quality improvement in soft wheat breeding.