نتایج جستجو برای: bvulgaris ssp vulgaris b vulgaris subsp maritima
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در این مطالعه چغندر وحشی WB42 (Beta vulgaris ssp. maritima) مقاوم به ریزومانیا با رنگ محور زیر لپه و رنگ ساقه گل‌دهنده قرمز به صورت جفتی با رگه‌های نرعقیم چغندرقند حساس به‌ریزومانیا (B. vulgaris. subsp. vulgaris) که دارای رنگ محور زیر لپه و رنگ ساقه گل‌دهنده سبز بودند، تلاقی داده شده و جمعیت‌هایF1، F2 و BC1 تهیه گردید. سپس، نسبت تفرق ژن‌های مربوط به رنگ محور زیر لپه، رنگ ساقه گل‌دهنده و م...
در این مطالعه چغندر وحشی wb42 (beta vulgaris ssp. maritima) مقاوم به ریزومانیا با رنگ محور زیر لپه و رنگ ساقه گل دهنده قرمز به صورت جفتی با رگه های نرعقیم چغندرقند حساس به ریزومانیا (b. vulgaris. subsp. vulgaris) که دارای رنگ محور زیر لپه و رنگ ساقه گل دهنده سبز بودند، تلاقی داده شده و جمعیت هایf1، f2 و bc1 تهیه گردید. سپس، نسبت تفرق ژن های مربوط به رنگ محور زیر لپه، رنگ ساقه گل دهنده و مقاومت ...
Beta vulgaris genus comprises wild and cultivated subspecies. The “maritima” subspecies is formed by wild or weedy accessions, well adapted to low-water potential environments; it was previously shown that B. vulgaris ssp. maritima has mechanisms of osmotic adjustment more effective than the cultivated B. vulgaris ssp. vulgaris. The response to a progressive lowering of soil potential was compa...
Understanding the factors that contribute to population genetic divergence across a species' range is a long-standing goal in evolutionary biology and ecological genetics. We examined the relative importance of historical and ecological features in shaping the present-day spatial patterns of genetic structure in two related plant species, Beta vulgaris subsp. maritima and Beta macrocarpa. Using...
PREMISE OF THE STUDY Agricultural practices routinely create opportunities for crops to hybridize with wild relatives, leading to crop gene introgression into wild genomes. Conservationists typically worry this introgression could lead to genetic homogenization of wild populations, over and above the central concern of transgene escape. Alternatively, viewing introgression as analogous to speci...
Rapid identification of agronomically important genes is of pivotal interest for crop breeding. One source of such genes are crop wild relative (CWR) populations. Here we used a CWR population of <200 wild beets (B. vulgaris ssp. maritima), sampled in their natural habitat, to identify the sugar beet (Beta vulgaris ssp. vulgaris) resistance gene Rz2 with a modified version of mapping-by-sequenc...
rhizomania is one of the most important sugar beet diseases in iran and some other parts of the world. in this study, the infection rate of the most important weeds of sugar beet fields under natural condition to the causal agent of the bnyvv (beet necrotic yellow vein virus) disease was investigated at fars agricultural research center , iran. roots were collected from the infected weeds and...
Gynodioecy is a breeding system where both hermaphroditic and female individuals coexist within plant populations. This dimorphism is the result of a genomic interaction between maternally inherited cytoplasmic male sterility (CMS) genes and bi-parentally inherited nuclear male fertility restorers. As opposed to other gynodioecious species, where every cytoplasm seems to be associated with male...
Management of rhizomania includes planting in cool soils, proper irrigation and soil fumigation with methyl bromide. However, breeding for resistance to BNYW is the most critical aspect of rhizomania control In this study, the inheritance of resistance to beet necrotic yellow vein virus (BNYW) in B. vulgaris subsp. maritima. wild beet (WB) accession WB42 was investigated. Crosses between resist...
The RNA3-encoded p25 protein of beet necrotic yellow vein virus (BNYVV) is responsible for the production of rhizomania symptoms of sugar beet roots (Beta vulgaris subsp. vulgaris). Here, it was found that the presence of the p25 protein is also associated with the resistance response in rub-inoculated leaves of sugar beet and wild beet (Beta vulgaris subsp. maritima) plants. The resistance phe...
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