Intraspecific hybridization and its bearing on chromosome evolution inVicia narbonensis (Fabaceae)

Pod, seed traits and cytotaxonomic studies of some Vicia narbonensis L. accessions ( Fabaceae )

“…The MCI value varied between 33.63% and 35.36% (Table 3). This result agrees with that observed by Raina et al, 1989, Cremonini et al, 1998 and Ashour et al (2005). According to El-Bakatoushi and Ashour (2009) and Navrátilová et al (2003), the similarity between accessions for the karyotype formula could be due to the similarity of their geographic origin and/or to the similarity of altitude of their origin sites.…”

“…All the studied accessions have the same karyotype formula (7sm). This agrees with that of Raina et al (1989) who found that all chromosomes are submetacentrics (7sm). According to Navrátilová et al (2003) and El-Bakatoushi and Ashour (2009), the existence of a single karyotype formula for different accessions of V. narbonensis L. may be due to the closest geographical origin and/or the similarity of altitudes from their original sites.…”

“…The diploid chromosome number of V. narbonensis L. was found to be 14 in all the studied accessions and this result agrees with the previous counts of Schäfer, 1973, Yamamoto, 1973, Raina et al, 1989, Cremonini et al, 1998, Perrino and Pignone, 1981, El-Bakatoushi and Ashour, 2009, Lamine, 2009. Fig.…”

“…1). These results agree with those of Raina et al (1989) but differ from those obtained by Perrino and Pignone, 1981, Yamamoto, 1973, Navrátilová et al, 2003, Kamel, 1999, El-Bakatoushi and Ashour, 2009. In Reference to Sinha and Roy (1979), the presence in our material of only one pair with a secondary constriction revealed that the studied accessions did not undergo much of hybridization and they might have retained some of their primitive characters.…”

Study of Some Characteristics Related to the Sexual Reproduction in Autotetraploid Vicia narbonensis

“…The economic importance of vetches has imposed a continuous investigation for the regulation of its outputs, the improvement of its fodder qualities and its adaptation to various types of conditions. New sources of variability can be obtained by the study of the natural populations distributed over the world (Maxted, 1995), the hybridization (Raina et al, 1989) or by the genomic changes for the creation of polyploid forms in particular the Indeed, the passage of the diploid state to the autoteraploïd one affected a great number of characters and had led to the creation of new genotypes in order to improve the existing variability. The presence of 4 allelic locations for the same locus provided a big number of combinations and reduced the modifications of the structure of the populations (Mansat and Picard, 1966).…”