ترجمه مقاله نقش ضروری ارتباطات 6G با چشم انداز صنعت 4.0
- مبلغ: ۸۶,۰۰۰ تومان
ترجمه مقاله پایداری توسعه شهری، تعدیل ساختار صنعتی و کارایی کاربری زمین
- مبلغ: ۹۱,۰۰۰ تومان
Meiotic analysis of 11 populations of 6 Hordeum species showed normal chromosome pairing and chromosomes segregation during anaphase in most of the anaphase and telophase cells, except few cases of laggard chromosomes, chromosome stickiness and tripolar formation. Cytomixis and chromosome migration occurred in different directions from early prophase to telophase-II in some of the species and populations studied leading to the formation of aneuploid cells and also formation of the meiocytes having double the normal chromosome number. Such unreduced meiocytes formed unreduced pollen grains. Two to five percent of the pollens formed were bigger in size and could be considered potential unreduced pollen grains. Other meiotic abnormalities caused some degree of pollen sterility.