Effect of Ogura male-sterile cytoplasm on the performance of cabbage hybrid variety |
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Authors: | Paulo E. de Melo Leonardo de B. Giordano |
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Affiliation: | (1) EMBRAPA/CNP Hortaliças, CP 218, 70.359-970 Brasília, DF, Brazil |
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Abstract: | Summary 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.Abbreviations dat days after transplanting - CMS Cytoplasmic Male Sterility - CNPH National Centre for Vegetable Crops Research |
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Keywords: | Brassica oleracea var. capitata white cabbage cytoplasmic male sterility hybrids self-incompatibility yellowing |
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