The embryo sac development of 53 collections of Themeda triandra Forssk. was studied. All the diploids and two of the tetraploids had sexual embryo sacs of the Polygonum-type, whereas the remaining polyploids possess 4-nucleate aposporic embryo sacs. Some of the collections are facultative apomicts, while others (in particular the penta- and hexaploids) are essentially obligate apomicts. Interesting variations in the type of apospory was encountered in the different apomicts. This variation might be due to environmental influences. On the whole it would appear from the results that Themeda triandra is a young and therefore still actively developing agamic complex in southern Africa
Polygonum-type embryo sac development was found in Lippia javanica (Burm. f.) Spreng., L. rehmannii ...
Thrasya petrosa (Trin.) Chase is the most widespread species of a grass genus indigenous to the New ...
Most apomictic plants are facultative, maintaining the ability to reproduce sexually at different fr...
The embryo sac development of 53 collections of Themeda triandra Forssk. was studied. All the diploi...
Metaphase I pairing associations and chiasmata, as well as anaphase I laggard and chromatid bridge d...
A population cytogenetic study was undertaken across a contact zone between Themeda triandra populat...
Twenty-four Themeda triandra plants, collected from a population on a 20-m2 plot in eastern Pretoria...
Meiosis was studied in 24 plants from a diploid Themeda triandra Forsk. population. This population ...
The genus Tribolium Desv. forms part of the tribe Danthonieae and is endemic to southern Africa. Thi...
In the autonomous apomictic Taraxacum offinale (common dandelion), parthenogenetic egg cells develop...
Meiotic and apomictic reproductive pathways develop simultaneously in facultative aposporous apomict...
Traditionally, tetraploid Paspalum notatum was considered an obligate or a facultative apomict accor...
The haploid chromosome number in Tamarix ericoides Rottl., reported for the first time, is twelve.Th...
The embryo-sac development in Gagea bohemica, G. chrysantha and G. granatellii conforms to the “Euph...
Cytological and embryological studies on apomictic species Bothriochloa ischaemum L. were carri...
Polygonum-type embryo sac development was found in Lippia javanica (Burm. f.) Spreng., L. rehmannii ...
Thrasya petrosa (Trin.) Chase is the most widespread species of a grass genus indigenous to the New ...
Most apomictic plants are facultative, maintaining the ability to reproduce sexually at different fr...
The embryo sac development of 53 collections of Themeda triandra Forssk. was studied. All the diploi...
Metaphase I pairing associations and chiasmata, as well as anaphase I laggard and chromatid bridge d...
A population cytogenetic study was undertaken across a contact zone between Themeda triandra populat...
Twenty-four Themeda triandra plants, collected from a population on a 20-m2 plot in eastern Pretoria...
Meiosis was studied in 24 plants from a diploid Themeda triandra Forsk. population. This population ...
The genus Tribolium Desv. forms part of the tribe Danthonieae and is endemic to southern Africa. Thi...
In the autonomous apomictic Taraxacum offinale (common dandelion), parthenogenetic egg cells develop...
Meiotic and apomictic reproductive pathways develop simultaneously in facultative aposporous apomict...
Traditionally, tetraploid Paspalum notatum was considered an obligate or a facultative apomict accor...
The haploid chromosome number in Tamarix ericoides Rottl., reported for the first time, is twelve.Th...
The embryo-sac development in Gagea bohemica, G. chrysantha and G. granatellii conforms to the “Euph...
Cytological and embryological studies on apomictic species Bothriochloa ischaemum L. were carri...
Polygonum-type embryo sac development was found in Lippia javanica (Burm. f.) Spreng., L. rehmannii ...
Thrasya petrosa (Trin.) Chase is the most widespread species of a grass genus indigenous to the New ...
Most apomictic plants are facultative, maintaining the ability to reproduce sexually at different fr...