Journal ArticleDOI
Gametophytic competition as influencing gene flow between wild and cultivated forms of pearl millet (Pennisetum typhoides)
Reads0
Chats0
TLDR
Deviations from the equiprobability of gamete encounters for almost all progeny are clearly demonstrated and reveal a large amount of male gametophytic fitness variability in land-race populations.Abstract:
Intergametophytic competitions with prepotency of autopollen have been previously described in some cultivated lines of pearl millet (Pennisetum typhoides (Burm.) Stapf &Hubb.). This paper reports the analysis of intergametophytic competitions between pollen from wild and cultivated plants on stigmas of both wild and cultivated plants. Three inbred lines (two cultivated and one wild) and two land races (one cultivated and one wild) were used, each of them as pollen donors as well as plant receptors. These populations represent in some instances allopatric and sympatric evolutionary situations between wild and cultivated forms. Deviations from the equiprobability of gamete encounters for almost all progeny are clearly demonstrated and reveal a large amount of male gametophytic fitness variability in land-race populations. There is no marked hierarchy between pollen sources for their competitive ability, but taking into account the pollen-pistil interactions, preferential wild-wild and cultivated-cultivated...read more
Citations
More filters
Journal ArticleDOI
Wild relatives and crop cultivars: detecting natural introgression and farmer selection of new genetic combinations in agroecosystems
Devra I. Jarvis,Toby Hodgkin +1 more
TL;DR: Molecular evaluation of natural introgression linked to investigations of farmer recognition and use of introgressed types provide ways of evaluating whether farmer selection for introgressive types is a significant process in increasing the genetic diversity of crop plants.
Book ChapterDOI
The Use of Molecular and Biochemical Markers in Crop Evolution Studies
TL;DR: When de Candolle (1882) initiated the study of crop evolution, his major concern was to identify the geographic origin, i.e., the domestication center, of individual crops.
Journal ArticleDOI
Long-term introgression of crop genes into wild sunflower populations
TL;DR: DNA pooling is not useful for accurate location of the QTL but rather to pick up genome regions containing QTLs of at least moderate effect, which means accuracy of QTL location is not increased with a dense number of markers, as opposed to individual typing.
Journal ArticleDOI
The persistence of cultivar alleles in wild populations of sunflowers five generations after hybridization
TL;DR: It is indicated that gene flow from cultivated into wild populations of sunflowers can result in the long-term establishment of cultivar alleles in wild populations and that neutral or favorable transgenes have the potential to escape and persist in wild sunflower populations.
Journal ArticleDOI
Diversity of wild and cultivated pearl millet accessions (Pennisetum glaucum [L.] R. Br.) in Niger assessed by microsatellite markers
Cédric Mariac,Viviane Luong,Issoufou Kapran,Aïssata Mamadou,Fabrice Sagnard,Monique Deu,Jacques Chantereau,Bruno Gérard,Jupiter Ndjeunga,Gilles Bezançon,Jean Louis Pham,Yves Vigouroux +11 more
TL;DR: A significantly lower number of alleles and lower gene diversity in cultivated pearl millet accessions than in wild accessions is shown, which contrasts with a previous study using iso-enzyme markers showing similar genetic diversity between cultivated and wild pearl Millet populations.
References
More filters
Book
Linear statistical inference and its applications
TL;DR: Algebra of Vectors and Matrices, Probability Theory, Tools and Techniques, and Continuous Probability Models.
Journal ArticleDOI
Linear Statistical Inference and its Applications
P. G. Moore,C. Radhakrishna Rao +1 more
TL;DR: The theory of least squares and analysis of variance has been studied in the literature for a long time, see as mentioned in this paper for a review of some of the most relevant works. But the main focus of this paper is on the analysis of variance.
Journal ArticleDOI
Linear Statistical Inference and Its Applications.
Journal ArticleDOI
Differential Staining of Aborted and Nonaborted Pollen
TL;DR: A single staining solution was made by compounding it in the following order (dyes were from British Drug Houses): ethanol, 10 ml; 1% malachite green in 95% ethanol, 1 ml; distilled water, 50 ml; glycerol 25 ml; phenol, 5 gm; chloral hydrate; acid fuchsin 5 ml; orange G, 1% in water 0.5 ml; glacial acetic acid, 1–4 ml.
Journal ArticleDOI
Evolution in closely adjacent plant populations
TL;DR: It is invalid to conclude that a monotonic cline for reproductive isolation gives a priori evidence of its evolution in allopatry, but the existence of inverse clines in isolating mechanisms strongly suggests the evolution of isolation in sympatry.