Inheritance of the unpigmented plant trait in Orobanche cumana
Unpigmented plants characterised by yellow stems and white flowers have been observed in several Orobanche spp. The objective of this research was to study the inheritance of the unpigmented plant trait in Orobanche cumana. Plants of the unpigmented line EK-A1 that had been self-pollinated for three generations (S3) were crossed with plants of the wild-type line EK-12 using hand emasculation and pollination. F1 plants showed an intermediate phenotype, characterised by a greenish stem compared with a yellow stem in EK-A1 plants and bluish-violet stem in EK-12 plants. F2 plants segregated in a 1:2:1 (bluish-violet: greenish: yellow) ratio, suggesting that plant pigmentation in O. cumana is controlled by a partially dominant allele at a single locus. Monogenic inheritance was confirmed in the F3 plant generation, which also revealed that the lack of pigmentation has no effect on O. cumana parasitism. This study demonstrated for the first time the feasibility of using hybridisation techniques for developing segregating populations in this species. Because of its simple mode of inheritance, the unpigmented plant trait may have a particular use as a morphological marker in basic and applied studies on O. cumana. © 2010 The Authors. Weed Research © 2010 European Weed Research Society.
| Main Authors: | , , , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Blackwell Publishing
2011-04
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| Subjects: | Hybridisation, Parasitism, Segregating populations, Sunflower broomrape, Unpigmented plants, |
| Online Access: | http://hdl.handle.net/10261/88829 |
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