Breeding Methods in Cross-Pollinated Species

Achievements and Challenges in Improving Temperate Perennial Forage Legumes

“…On the other hand, genotype selection under spaced planting (i.e., in the absence of intraspecific competition), although frequently adopted in forage breeding (Poehlman and Sleeper, 1995;Posselt, 2010), was predicted to provide only about 60% of the forage yield gains provided by selection under dense planting (Annicchiarico, 2006b). This is caused by the only moderate genetic correlation for genotype yield responses across these conditions (Table 4; this agrees with phenotypic correlation values reported in other studies, e.g., Riday and Brummer, 2004).…”

Plant Breeding: Past, Present and Future

“…It has proved popular in perennial forage crops and amenity grasses over the last 100 and last 50 years, respectively (Posselt 2010). It has proved popular in perennial forage crops and amenity grasses over the last 100 and last 50 years, respectively (Posselt 2010).…”

“…Furthermore, all breeders face the issue of the effectiveness of selecting individual plants grown at wide spacing compared with assessing potential cultivars under normal growing density; for example, spaced plants versus swards in grass breeding (Posselt 2010). Equally important for the success of a breeding programme is the choice of environment at every intermediate stage where families, inbred lines, hybrids or clones are assessed and selected, depending on the type of cultivar being sought.…”

Marker-trait association analysis for agronomic and compositional traits in sainfoin (Onobrychis viciifolia)

“…Sainfoin breeders have to contend with an allogamous (outbreeding) reproduction system, as is common in most forage species, and is often secured through self-incompatibility mechanisms (Humphreys, 2000;Posselt, 2010). Hence, under the absence of efficient methods to induce self-fertilization or perform controlled crosses between inbred individuals, varieties are classically bred as open pollinated varieties or synthetics.…”

“…Hence, under the absence of efficient methods to induce self-fertilization or perform controlled crosses between inbred individuals, varieties are classically bred as open pollinated varieties or synthetics. Starting from selection of superior plants within a base population, this process of developing a new variety takes at least ten years (Posselt, 2010). The resultant varieties exhibit high levels of genetic diversity, evoking a generally broad environmental adaptability.…”