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Genetics of Resistance in Vicia sativa L. to Orobanche crenata Forsk. (1987)

Gil, J. ; Martin, L. M. ; Cubero, J. I.

Oxford, UK : Blackwell Publishing Ltd

Plant breeding 99 (1987), S. 0

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ISSN: 1439-0523

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition

Notes: The genetics of resistance of common vetch (Vicia sativa L.) to broomrape (Orobanche crenata Forsk.) was studied for two years by using the P1, P2, F1, BC1, BC2, F2 F3, and F4 generations obtained from crosses between resistant and susceptible lines. Resistant lines were selected by screening a world collection m a naturally infested plot. Resistance was tested both under field and greenhouse conditions. The best index to measure resistance was the number of emerged broomrapes per host plant. The results fit the additive-dominance model. The main component of the variation was additivity; dominance and interaction effects seemed to depend on the environment. When dominance is expressed, a low number is dominant over a high number of broomrapes per host plant.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1111/j.1439-0523.1987.tb01162.x

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Genetic changes under domestication in Vicia faba (1986)

Suso, M. J. ; Cubero, J. I.

Springer

Theoretical and applied genetics 72 (1986), S. 364-372

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ISSN: 1432-2242

Keywords: Inheritance ; Evolution ; Vicia faba ; Domestication

Source: Springer Online Journal Archives 1860-2000

Topics: Biology

Notes: Summary The components of variation within each one of two sets of landraces and/or cultivars of Vicia faba, respectively constituted of primitive and advanced morphological types, were studied by means of two sets of 8 × 8 diallel crosses with two repetitions. The results show that primitive and modern forms differ from each other in both the intensity and the kind of selective pressures acting on them, mainly on those characters more modified through the domestication process: i.e., seed morphology and the number of flowers per node. Because of the paramount importance of the additive component in the primitive forms, it is suggested that the most important type of selection on them is the stabilizing one. On the contrary, in the most advanced forms the selection is directional and disruptive : directional towards greater yields, and disruptive separating two morphological types, ‘major’ and ‘equina’. The plant response to these different selective pressures has been to modify the genetic control of different characters: thus the primitive forms generally show only additivity while the most advanced forms show additivity as well as directional and asymmetrical dominance.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00288574

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