A new technique for sorting male and female mosquito larvae may lead to the use of sterile males in tackling malaria. Nigel Williams reports. the testicles of the male mosquitoes fluorescent, allowing the scientists to distinguish and easily separate them from females. The plan is to breed, sterilize and release millions of these male insects so they mate with females but produce no offspring. ...

Fertile plants undergoing male gametogenesis can be treated with nitrous oxide (N(2)O) gas to obtain 2n male gametes. N(2)O treatment is also expected to restore the fertility of interspecific hybrids through meiotic restitution or mitotic amphidiploidization. However, this technique has few applications to date, and it is un-known how N(2)O treatment restores fertility in sterile hybrids. To e...

We previously discovered carpelloid stamens when breeding cytoplasmic male sterile lines in broccoli (Brassica oleracea var. italica). In this study, hybrids and multiple backcrosses were produced from different cytoplasmic male sterile carpelloid stamen sources and maintainer lines. Carpelloid stamens caused dysplasia of the flower structure and led to hooked or coiled siliques with poor seed ...

We studied the dispersal behavior and survival of sterile medfly males either treated or not with ginger root oil (GRO), in field conditions, in Petrolina-PE, northeast Brazil, from May 2006 to December 2007 in a sterile insect technique (SIT) program. The tsl strain Vienna 8 from the Ceratitis capitata Wied. (Diptera: Tephritidae), medfly, mass-rearing facility located in Juazeiro-BA, Brazil, ...

ALE sterility in plants is of unusual interest since its inheritance is due M to a number of different mechanisms. In the early days of genetics a controversy existed as to the relative importance of the nucleus and the cytoplasm in inheritance. Many investigators believed the nucleus was all-important and relegated the cytoplasm to a non-essential role. That the cytoplasm did not always play a...

Berberis thunbergii L. (Japanese barberry) holds significant market share in the commercial ornamental horticulture industry. Japanese barberry is grown by production nurseries and used landscaping across northern half of United States. In 2009, crop was worth nearly $30.5 million annual sales States, making it one top two shrubs, roses excluded. [U.S. Department Agriculture (USDA) 2009]. Dirr ...

The Cichorium intybus flower development in fertile, cytoplasmic male sterility (CMS 524) and various phenotypes carrying the 524 male sterile cytoplasm was investigated macroscopically and by light microscopy. The development was similar in fertile and in male sterile florets up to meiosis, and then it was affected in anther wall structure and pollen grain development in male sterile floret. I...

The Þrst genetic sexing system for the melon ßy, Bactrocera cucurbitae (Coquillett), based on pupal color was developed. The recessive white pupae mutant, wh, was used in a putative chromosome translocation linking the wildtype allele to the male sex. This system permits the separation of males (wildtype brown pupae) from females (mutant white pupae). Results from laboratory studies indicated t...