Perennial ryegrass (Lolium perenne) is the primary pasture crop supporting New Zealand's agricultural industry.
Limited genetic gains have been made with current breeding strategies compared to other grass crops such as rice and maize, which have benefited from hybrid breeding.
One of the largest constraints on improving genetic gain in L. perenne is self-incompatibility (SI). SI in L. perenne is determined by a two-loci genetic mechanism that stops pollen fertilizing flowers from the same plant, forcing plants with different genetic backgrounds to breed.
A naturally occurring mutation that confers self-fertility (SF-locus) has been found in European ryegrass. In this project self-compatible (SC), European, ryegrass was crossed with NZ elite ryegrass to develop several inbred families (populations).
To detect and track the inheritance of the SF-locus, molecular markers were developed for use in this population. Genotyping-by-Sequencing (GBS) was used to determine the ability of these families to inbreed, as well as to assess changes in levels of heterozygosity.
This works provides a starting point for a step change in ryegrass breeding, where inbred cultivars can be used to develop elite, hybrid varieties with increased genetic gain, that support pastural industries through environmental changes.
Zoom link: https://otago.zoom.us/j/97756704741
|Date||Tuesday, 12 July 2022|
|Time||12:00pm - 1:00pm|
|Audience||Undergraduate students,Postgraduate students,Staff|
|Event Category||Health Sciences|
Online and in-person
|Location||Biochemistry Seminar Room G.13 (BIG13) and via Zoom, Dunedin|
|Contact Name||Department of Biochemistry|