Characterization of genes expressed during the development of Brassica napus pollen

The study of the formation of pollen in plants has been the focus of extensive morphologic and cytologic observations. This complex developmental process requires the coordinated activity of both gametophytic and sporophytic tissues. The events that occur during microspore development represent a carefully orchestrated program of physiologic, biochemical, and genetic activities. Genes expressed specifically in pollen or in sporophytic tissues that support pollen development have only recently been identified and described. In the present paper we describe several genes expressed during pollen development in the important oil seed species Brassica napus (oil seed rape/canola). The characterization of three gene families expressed during microspore development is reviewed which provides a basis for comparison with other genes expressed during pollen maturation. The potential value of these genes for the development of novel plant breeding strategies and hybrid seed production is discussed.