نتایج جستجو برای: matricaria chamomilla genetic diversity indirect selection selection indexpath analysis

تعداد نتایج: 3646821  

Journal: :Revista Brasileira de Ciências Agrárias - Brazilian Journal of Agricultural Sciences 2019

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Richard A Neher Taylor A Kessinger Boris I Shraiman

In sexual populations, selection operates neither on the whole genome, which is repeatedly taken apart and reassembled by recombination, nor on individual alleles that are tightly linked to the chromosomal neighborhood. The resulting interference between linked alleles reduces the efficiency of selection and distorts patterns of genetic diversity. Inference of evolutionary history from diversit...

Journal: :پژوهش های حبوبات ایران 0
شاهین واعظی رقیه چراغ افروز احمد عباسی مقدم

genetic diversity in bean collection can be used in breeding program for selection of genotype with desirable agronomic traits. fifty two accessions of common bean (phaseolus vulgaris) has been evaluated for genetic diversity of agronomic traits, grain quality and determination of association between grain yield and some morphological traits at research farm of national plant gene bank of iran,...

Journal: :پژوهش های تولید گیاهی 0
هاجر عابدین پور دانشگاه علوم کشاورزی و منابع طبیعی ساری غلامعلی رنجبر دانشگاه علوم کشاورزی و منابع طبیعی ساری نادعلی بابائیان جلودار دانشگاه علوم کشاورزی و منابع طبیعی ساری بهروز گلعین موسسه تحقیقات مرکبات رامسر

it is important to identify the genetic diversity and phylogenic relationships for achieving desirable citrus cultivars. in present investigation rapd markers were used to determine genetic diversity among 29 citrus genotypes. from 19 used primers, 248 polymorphic bands were amplified. primers opa-07 and opa-05 (with 19 and 8 amplified bands), produced maximum and minimum polymorphic bands, res...

2018
Mara Lisa Alves Maria Belo Bruna Carbas Cláudia Brites Manuel Paulo Pedro Mendes-Moreira Carla Brites Maria do Rosário Bronze Zlatko Šatović Maria Carlota Vaz Patto

Modern maize breeding programs gave rise to genetically uniform varieties that can affect maize's capacity to cope with increasing climate unpredictability. Maize populations, genetically more heterogeneous, can evolve and better adapt to a broader range of edaphic-climatic conditions. These populations usually suffer from low yields; it is therefore desirable to improve their agronomic perform...

H. Ghiasi, M. Khaldari, R. Taherkhani

The effect of ordinary and restricted selection indices on body weight at different ages changes in birth weight of Iranian Moghani sheep was studied. Traits in the aggregate genotype were birth weight (BW), body weights at 3 (BW3) and 12 months of age (BW12). Two ordinary selection indices (I1 and I2) and two restricted selection indices (R1 and R2) were constructed. BW and BW3 were included i...

2017
Yu Wang Dierck Segelke Reiner Emmerling Jörn Bennewitz Robin Wellmann

The long-term performance of different selection strategies was evaluated via simulation using the example of a local cattle breed, German Angler cattle. Different optimum contribution selection (OCS) approaches to maximize genetic gain were compared to a reference scenario without selection and truncation selection. The kinships and migrant contribution (MC) were estimated from genomic data. T...

2018
Dustin Brisson

Persistent genetic variation within populations presents an evolutionary problem, as natural selection and genetic drift tend to erode genetic diversity. Models of balancing selection were developed to account for the maintenance of genetic variation observed in natural populations. Negative frequency-dependent selection is a powerful type of balancing selection that maintains many natural poly...

Journal: :journal of agricultural science and technology 2010
f. ayoughi m marzegar m. a. sahari h. naghdibadi

the present study explores the chemical constitution and antioxidant activity of the essential oils of the aerial parts of artemisia dracunculus l. and the flower heads of matricaria chamomilla l. gc-ms analysis revealed the presence of (z)-anethole (51.72%), (z)-β-ocimene (8.32%), methyleugenol (8.06%), limonene (4.94%) and linalool (4.41%) in artemisia dracunculus and (e)-β-farnesene (24.19%)...

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