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Powdery mildew, caused by Blumeria graminis f. sp. tritici, is one of the most important foliar diseases of cereals. Infection by this pathogen on triticale has intensified in Poland in the last few years. In this study we examined resistance to powdery mildew in triticale hybrids possessing resistance genes Pm4b and Pm6 introduced from common wheat. The materials tested were hybrids derived from...
Megasporogenesis and female gametophyte development were investigated in ovules of the everbearing strawberry Fragaria × ananassa Duch. cv. Selva. Observations of thin sections revealed that ovule development starts from the formation of a nucellus and coincides in time with the beginning of receptacle overgrowth. The most characteristic feature during nucellus differentiation is the formation of...
At a molecular level, the length of the vernalization period of common wheat (Triticum aestivum L.) is determined mainly by three loci: VRN-1, VRN-2 and VRN-3. In hexaploid wheat, the Vrn-A1, Vrn-B1 and Vrn-D1 genes are dominant for spring growth habit and epistatic to the alleles for winter growth habit. We used DNA markers to determine the VRN-1 genotypes of 43 common wheat cultivars from the Polish...
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