Biotechnology and Ecology of Pollen (2012)
David L. Mulcahy, Gabriella Bergamini Mulcahy, Ercole Ottaviano

Factors Influencing Artificial Gametophyte Selections using Synthetic Stigmas (113-118)
Robert N. Bowman

Traits Subject to Selection (1986, pp. 116-117)

Theoretically, a wide spectrum of traits can be selected in the male gametophyte and expressed in subsequent sporophyte generations, provided that the genes controlling the desired trait are active in both phases. Willing et al. (1984), Tanksley et al. (1981) and others have shown that the degree of genetic overlap between the two phases is extensive, encompassing 60 percent or more of the total genome. Fortunately, many desired traits including resistance to several herbicides, toxins or salt are probably controlled by genes regulating basic aspects of cell metabolism.. The likelihood that these genes are expressed in both phases is high. With regard to salt tolerance, Sacher et al. (1983) were able to select for salt resistant pollen in Lycopersicon hybrids by immersing pollen in salt solutions prior to pollination. Resistance to salt was demonstrated in the succeeding sporophyte generation.