Intergeneric Pollen-Stigma Incompatibility in the Cruciferae

Pollen-Pistil Interactions and Their Role in Mate Selection

“…A recent comprehensive study of interspecific compatibility in the tomato clade demonstrated that the SI 3 SC rule is closely followed at the species level (Baek et al, 2015). In addition to the Solanaceae, UI consistent with the SI 3 SC rule has been recorded in Lilliaceae (Ascher and Peloquin, 1968), Poaceae (Heslop-Harrison, 1982), Brassicaceae (Sampson, 1962;Hiscock and Dickinson, 1993), and Orchidaceae (Pinheiro et al, 2015). Although the SI 3 SC rule applies broadly, differences between SI and UI, such as the timing of the response ( Fig.…”

Cytogenetical studies in the inbred lines of radish (Raphanus sativus L. var. radicola Pers.) and their hybrids. IV. Germination of pollen grains on stigma.

“…This inhibits germination of other wise normal and healthy pollen grains on their own stigma (Pandey 1960, Tatebe 1959, Sampson 1957, 1962). …”

“…However, meiotic aberrations alone can not account for the reduction of fertility in the inbred lines since they still have sufficiently high percentage of normal (fertile) pollen grains. Radish is charac terized by sporophytic system of self-incompatibility (Sampson 1957, 1962, Putra ment 1960. It was pointed out earlier that the composition of S-gene complex might have been affected in the inbred lines of an allogamous population like radish due to prolonged inbreeding.…”

Gametophytic-sporophytic incompatibility in the Cruciferae – Brassica campestris

“…To keep the counts and assessments as objective as possible all the pollinations were done by M. I. Zuberi, given a code number unknown to D. Lewis, who made the preparation and scored all the material for one day without knowing the details of pollination. Pollen counts from mass but not restricted pollination have been made in Brassica and Raphanus by Tatebe (1940) and Sampson (1962) to show the number of pollen grains on the stigma after self and cross S compatible pollinations. Cornish et aL (1979) used an aerial dust to great effect to obtain accurate counts in the grass Lolium perenne and were able to distinguish four different proportions of + and -pollen.…”