an economically viable crop requires improvement of many traits, such as rubber yield and plant vigor. Male sterility is characterized by a lack of functional pollen and has been identified in over 600 species including many agriculturally important
Breeding of artichoke (Cynara scolymus L.), a cross-pollinated species, has been hindered by the lack of any recognized system of self-incompatibility or male-sterility (1). While making controlled pollinations with bagged flower heads during the spring of 1981, 3 male-sterile (MS) plants in the same half-sib family were found. The female parent of these plants, which had been selected from a segregating population derived from seed of unknown origin, produced abundant pollen.
using gamma irradiation has been used to develop a number of ornamental cultivars ( Shu et al., 2012 ). Traits that can be influenced by mutation breeding include time of flowering and fruit ripening, pollen abortion and sterility, improved disease and
A sterility disorder (DSD) of ‘Darrow’ blackberry, a common problem in this cultivar in the eastern United States, causes partial to almost complete sterility without visible damage to other floral or vegetative parts. DSD withstands prolonged heat treatment in the plant, even when followed by shoot apex culture. DSD was not graft-transmissible by petiole insert leaflet grafting from known sterile ‘Darrow’ plants to healthy ‘Darrow’ or healthy ‘Marion’ blackberry plants. DSD is stable in symptom expression in varying environments and remains during various types of vegetative propagation. Therefore, the cause of DSD seems likely to be of genetic origin. A new disease agent, Alpine mosaic agent, was found in this study that is symptomless in ‘Darrow’ blackberry but causes mosaic symptoms in leaflets of Alpine strawberry leaflet-grafted from certain ‘Darrow’ clones, both sterile and fruitful. Its identity and economic importance are unknown.
C. oleifera , and although C. oleifera is a crosspollinated plant with strong heterosis in the F 1 generation ( Han et al., 2015 ), crossbreeding requires labor-intensive emasculation in the field. In general, male sterility is a much sought
The inheritance of male sterility in geranium is described and 2 genes, ms 1 and ms 2 are identified.
a hybrid between L. indica × L. speciosa . Sterility may be an asset if superior clones can be selected from the F 1 population, because it would prevent the possibility of the plants becoming invasive ( Pooler, 2006b ). However, sterility in the
, hybrid vigor can improve the yield, resistance, and quality of pepper. Cytoplasmic male sterility facilitates the production of hybrid seed. A major concern of hybrid seed production is prevention of self-pollination that can produce seeds that are not
, seed collected from commercial nurseries were tested, and plants demonstrating sterility in the test plot were pollinated under controlled conditions in the greenhouse. The DNA content of all clones was determined using flow cytometry. Materials and
Hybrid-onion ( Allium cepa ) seed is produced using sources of CMS. The first source of onion CMS was described by Jones and Clarke (1943 ), and male sterility is conditioned by the interaction of the male-sterile (S) cytoplasm with the