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The 1AL.1RS translocation in the hard red winter wheat 'Nekota'
Abstract
The presence of the short arm of rye chromosome (IRS) has been associated with agronomic advantages and a decrease in end-use quality in hard red winter wheat (Triticum aestivum L Em. Thell). These effects have been demonstrated mainly with the 1BL.1RS translocation. Less information is available regarding the effect of the 1AL.1RS translocation. The objective of this research was to determine the effect of the 1AL.1RS translocation on agronomic and end-use quality traits and their stability across diverse winter wheat environments. Derived from the heterogeneous cultivar Nekota 16 homogeneous 1AL.1RS lines, 18 1A lines (non-1RS), four composites (1AL.1RS, 1A, 1AL.1RS + 1A and Nekota), and six check cultivars were seeded in eight Nebraska environments. The presence of 1AL.1RS translocation in the Nekota background increased kernel weight (3.3%), grain volume weight (0.4%) and flour protein (4.3%); had no effect on grain yield, kernels per spike, and anthesis date; and decreased kernels per spike (0.4%), plant height (1.2%), spikes per square meter (2.9%), flour yield (2.3%), mixing time (from 2.9 to 2.7 min) and mixing tolerance (from 3.5 to 3.1). The increase in flour protein was not accompanied by a decrease in grain yield. However, the higher flour protein in the 1AL.1RS lines did not cause an improvement of Mixograph mixing traits. The 1A and 1AL.1RS had similar stability for grain yield, kernels per spike, spikes per square meter, plant height, flour yield, and flour protein. The 1A lines were more responsive to the environment than the 1AL.1RS lines for kernel weight, gain volume weight, mixing time, and mixing tolerance. The 1AL.1RS lines had exceptional stability for mixograph mixing traits. The 1AL.1RS translocation on Nekota was not beneficial for grain yield and agronomic performance and was detrimental for end-use quality. Nekota can be described as a mixture of 1A lines with good agronomic and end-use quality performance and 1AL.1RS lines with good agronomic and poor to good end-use quality performance.
Subject Area
Agronomy|Plant propagation|Genetics
Recommended Citation
Espitia Rangel, Eduardo, "The 1AL.1RS translocation in the hard red winter wheat 'Nekota'" (1997). ETD collection for University of Nebraska-Lincoln. AAI9823376.
https://digitalcommons.unl.edu/dissertations/AAI9823376