منابع مشابه
Intragenic Recombination in Maize: Pollen Analysis Methods
The ability to stain mature pollen grains for the presence of alcohol dehydrogenase (ADH) activity permits the quantitation of ADH+ gametophytes at frequencies below 10-6. This resolution allows reversion and genetic fine structure analyses. The rationale of pollen analysis follows Nelson’s prototype studies with waxy. As with the waxy gene, revertant frequencies for seven Adhi-deficient (Adhi-...
متن کاملMaize pollen test systems to detect nondisjunction.
Three pollen test systems to detect the induction of nondisjunction in maize are actively being explored. (1) Each member of a tetrad of haploid microspores produced by meiosis contains a single chromosome 6 which carries the only nucleolar organizing region in the maize genome. Thus, each member of a normal tetrad contains one nucleolus. If nondisjunction took place at the first or second meio...
متن کاملA Group-1 Grass Pollen Allergen Influences the Outcome of Pollen Competition in Maize
Worldwide, 400 million people suffer from hay fever and seasonal asthma. The major causative agents of these allergies are pollen specific proteins called the group-1 grass pollen allergens. Although details of their antigenicity have been studied for 40 years with an eye towards immunotherapy, their function in the plant has drawn scant attention. Zea m 1 constitutes a class of abundant grass ...
متن کاملPreceramic Maize in Central Panama: Phytolith and Pollen Evidence
Caudill, W. A. 1973 The Influence of Social Structure and Culture on Human Behavior in Modern Japan. Journal of Nervous and Mental Disease 157:240-257. Caudill, W., and C. Schooler 1973 Child Behavior and Childrearing in Japan and the United States: An Interim Report. Journal of Nervous and Mental Disease 157(5):323-338. Caudill, W., and H. Weinstein 1969 Maternal Care and Infant Behavior in Ja...
متن کاملIdentifying the allergenicity of maize pollen in Iran.
BACKGROUND Maize is a member of the Poaceae family, capable of producing large amounts of pollen grains which may constitute important allergens in spring and summer. The aim of this study was to determine the protein content of maize pollen and its allergenicity in guinea pigs. METHODS The morphology of maize pollens was determined using light microscopy and scanning electron microscopy. The...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Evolution
سال: 1993
ISSN: 0014-3820
DOI: 10.1111/j.1558-5646.1993.tb01248.x