Genetic Diversity of Synthetic Alfalfa Generations and Cultivars Using Tetrasomic Inherited Allozyme Markers
عنوان مقاله: Genetic Diversity of Synthetic Alfalfa Generations and
Cultivars Using Tetrasomic Inherited Allozyme Markers
شناسه ملی مقاله: JR_JASTMO-13-3_011
منتشر شده در در سال 1390
شناسه ملی مقاله: JR_JASTMO-13-3_011
منتشر شده در در سال 1390
مشخصات نویسندگان مقاله:
M. Valizadeh - Department of Crop Production and Plant Breeding, Faculty of Agriculture, University of Tabriz, Islamic Republic of Iran.
M. Mohayeji - Department of Crop Production and Plant Breeding, Faculty of Agriculture, University of Tabriz, Islamic Republic of Iran.
N. Yasinzadeh - Department of Crop Production and Plant Breeding, Faculty of Agriculture, University of Tabriz, Islamic Republic of Iran.
S. Nasrullazadeh - Department of Crop Production and Plant Breeding, Faculty of Agriculture, University of Tabriz, Islamic Republic of Iran.
M. Moghadam - Department of Crop Production and Plant Breeding, Faculty of Agriculture, University of Tabriz, Islamic Republic of Iran.
خلاصه مقاله:
M. Valizadeh - Department of Crop Production and Plant Breeding, Faculty of Agriculture, University of Tabriz, Islamic Republic of Iran.
M. Mohayeji - Department of Crop Production and Plant Breeding, Faculty of Agriculture, University of Tabriz, Islamic Republic of Iran.
N. Yasinzadeh - Department of Crop Production and Plant Breeding, Faculty of Agriculture, University of Tabriz, Islamic Republic of Iran.
S. Nasrullazadeh - Department of Crop Production and Plant Breeding, Faculty of Agriculture, University of Tabriz, Islamic Republic of Iran.
M. Moghadam - Department of Crop Production and Plant Breeding, Faculty of Agriculture, University of Tabriz, Islamic Republic of Iran.
Enzyme electrophoresis was used to measure genetic variation within, and divergence
among, three generations of recently bred synthetic alfalfa generations (Syn۱, Syn۲, and
Syn۳) originating from a polycross of ۱۲ selected parents and several cultivars. Three
isozyme loci, exhibiting tetrasomic inheritance in ۱۰-day seedlings, were detected from five
enzymatic systems analyzed by polyacrylamide slab gel electrophoresis for about ۱۰۰
individuals of each alfalfa population. Very high levels of heterozygosity (ranging from
۰.۵۲۱ to ۰.۶۹۹) were observed within alfalfa populations, using polymorphic loci. The
reduction in heterozygosity was about ۵% from Syn۱ to Syn۲ and from Syn۲ to Syn۳. The
last open pollinated generation was found to be in W-H equilibrium as well as Gharayonja,
a native ecotype under examination, using c۲-test. Application of Wright's Fstatistics
revealed that the estimated overall inbreeding coefficient, (FIT), of ۹.۴% was
mainly related to inbreeding or double reduction in alfalfa (FIS= ۸.۶۱%) rather than
random genetic drift or population differentiation (FST= ۱.۶%). Therefore, due to very
large intra-population diversity, the breeding program of the synthetic alfalfa did not
generate a large variety differentiation. However, the use of seedling allozymic loci can be
applied successfully for estimation of the population genetic parameters.
کلمات کلیدی: Genetic diversity, Alfalfa, Allozymes, Tetrasomic inheritance
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/1827283/