نتایج جستجو برای: desynapsis
تعداد نتایج: 35 فیلتر نتایج به سال:
The heat shock proteins (HSPs) are a group of homologous proteins encoded with a multigene family. They can be divided into five groups based on both size and function; including HSP27, HSP60, HSP70, HSP90 and HSP100. Expression of HSPs can be constitutive and can increased when cells undergo metabolic and/or heat stress. HSPA2/Hsp70-2 is a kind of HSP70 and constitutively expressed in testis. ...
M A N Y characters which would-be desirable in cultivated crops are known to exist in related species and genera. The most striking examples of such characters are the resistances to various diseases. Where hybridization can be achieved between the pertinent genera, attempts have been made to transfer genes for these desired characters into the genome of the cultivated species. Partially for th...
مطالعات کاریوتیپی و میوزی در 17 جمعیت از چهار گونه از جنس Clypeola برای نخستین بار در ایران مورد بررسی واقع شده است. گونه‌های مورد بررسی از نظر وضعیت کروموزومی در دو گونه C. lappacea و C. dichotoma دیپلوئید با 2n=2x=14 است در حالی که دو گونه C. aspera و C. jonthlaspi تتراپلوئید بودند. نتایج 2n=4x=26 & 24 برای گونه C. aspera و 2n=4x=32 برای C. jonthlaspi گزارشات موجود در خصوص C. jonthlaspi, C. l...
The most common type of reproductive mutations observed in the soybean [Glycine max (L.) Merr.] are those that induce male sterility. The high frequency of occurrence of male-sterile mutations indicates that a number of genes influence the processes of microgametogenesis and microsporogenesis. The current knowledge of these mutations is summarized. The origins of male-sterile mutations, their i...
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