Versuche zur Erzeugung polyploider Rassen bei der Gattung Ornithopus

The breeding system of Ornithopus sativus Brot. subsp. sativus

“…The breeding system of O. sativus was confirmed to be autogamous self‐pollination, but with significant opportunity for cross‐pollination as predicted by Klinkowski and Griesinger (1939) and Pfeffer (1963). The significant level of cross‐pollination indicates there are opportunities for breeding for desirable traits within the species but is also a warning that shifts in population structure could occur in response to selective pressure.…”

“…The breeding system of O. sativus was confirmed to be autogamous self-pollination, but with significant opportunity for crosspollination as predicted by Klinkowski and Griesinger (1939) and Pfeffer (1963).…”

“…However, as the flowers “open”, these studies concluded that there was an opportunity for cross‐pollination in swards with access to insect pollinators. Indeed, cross‐pollination in O. sativus was predicted by Klinkowski and Griesinger (1939) and Pfeffer (1963), as there was evidence of heterogeneity for flower colour in some of the individuals. Understanding the breeding system of any forage legume species is necessary to determine appropriate conditions to manage cross‐pollination.…”

“…In most genotypes of O. sativus , the standard and wing petals appear light pink, which is the result of red or dark pink venation on a white background (see Figure 1B). Rare accessions with pure white (Figure 1A), burgundy, yellow or yellow/pink flowers are held by Genetic Resource Centres and some of this germplasm may have similar origins to the flower colours used by Klinkowski and Griesinger (1939), and Pfeffer (1963), in their hybridization studies. To assist in determining the level of sexual reproduction in O. sativus, we firstly determined the inheritance of flower colour and its relationship to hypocotyl pigmentation, and then the percentage of cross‐pollination under conditions of a spaced plant selection nursery in an open field situation.…”

“…In most genotypes of O. sativus, the standard and wing petals appear light pink, which is the result of red or dark pink venation on a white background (see Figure 1B). Rare accessions with pure white ( Figure 1A), burgundy, yellow or yellow/pink flowers are held by Genetic Resource Centres and some of this germplasm may have similar origins to the flower colours used by Klinkowski and Griesinger (1939), and Pfeffer (1963), in their hybridization studies.…”