Effect of Ogura male-sterile cytoplasm on the performance of cabbage hybrid variety

Abstract

Cabbage hybrid seeds are commercially produced by means of self-incompatibility. This system may show some instability mainly under tropical conditions, where cytoplasmic male sterility can be an alternative approach for hybrid seeds production . However, cabbage hybrids holding Ogura male-sterile cytoplasm show some irregularities during development. By assessing some characteristics during the growing cycle of male-sterile cabbage hybrids and comparing them to genomic similar male-fertile ones and to the most common cabbage hybrid cultivated in Brazil, it was observed that the male-sterile hybrids had the same vigour, uniformity, number of leaves, resistance to Xanthomonas campestris pv . campestris, and earliness as their male-fertile counterparts and performed better than the commercial check hybrid for some of these characteristics . Although male-sterile hybrids showed yellowing of leaves, some parental combinations succeeded in overcoming or strongly reducing this cytoplasmic effect .

Gene Dispersal from Transgenic Crops. I. Growth of Interspecific Hybrids Between Oilseed Rape and the Wild Hoary Mustard

“…Homogeneous germination was carefully controlled in order to avoid any maternal effects on germination due to maternal tissues. However, some interaction between the Ogura male sterile cytoplasm and the hoary mustard nuclear genome cannot be discounted, but is considered to be unlikely since no effect had been detected in other work with the same cytoplasm (de Melo & Giordano 1994 the hybrid never appeared with lower competitive ability than hoary mustard. A similar trend has recently been found for hybrids between sugar beet and wild sea beet (Fredshavn & Poulsen 1995) and between weedy and cultivated radishes (Klinger & Ellstrand 1994).…”

Introgression of ‘Ogura’ cytoplasm in cabbage alters its nutritional quality and antioxidant activities

“…Dey et al (2011) have reported that chloroplast substituted Ogura cytoplasm does not affect vegetative and commercial traits significantly; however, floral and reproductive traits were influenced considerably in cauliflower. The effect of Ogura cytoplasm introgression on agronomic traits of cabbage has already been reported by Melo and Giordano (1994). However, effect of this alien cytoplasm on nutritional quality of cabbage is still unknown.…”

Successful backcrosses of somatic hybrids betweenSinapis albaandBrassica oleraceawith theBrassica oleraceaparent

“…Such nuclear-organellar incompatibilities led in some somatic hybrids to disturbances in habit or flower traits such as male sterility, necroses or a low nectar secretion, e.g. in the Ogura system , Ceiis and Jourdan 1993, de Melo and de Giordano 1994.…”