Trypanotolerance in N’Dama x Boran crosses under natural trypanosome challenge: effect of test-year environment, gender, and breed composition

Expression of trypanotolerance in N’Dama x Boran crosses under field challenge in relation to N’Dama genome content

BACKGROUND Animal trypanosomosis in sub-Saharan Africa is a major obstacle to livestock based agriculture. Control relies on drugs with increasing incidence of multiple-drug resistance. A previous mapping experiment in an F2 population derived from the indigenous trypanotolerant N'Dama cattle crossed to susceptible (Kenya)-Boran cattle under controlled challenge, uncovered a number of trypanoto...

Trypanotolerance. an individual not a breed character.

Ten animals from a reputedly trypanosensitive bovine breed, the Zebu, and ten from a reputedly trypanotolerant breed, the Baoulé, were exposed to natural trypanosome challenge in an area of high Glossina density. The ten Zebus and five of the Baoulés died within 6 to 11 weeks with heavy parasitaemia and severe anaemia. The five other Baoulés showed little or no parasitaemia, no anaemia and were...

Cloning of the African indigenous cattle breed Kenyan Boran

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investigating the effect of motivation and attitude towards learning english, learning style preferences and gender on iranian efl learners proficiency

تحقیق حاضر به منظور بررسی تاثیر انگیزه و نگرش نسبت به یادگیری زبان انگلیسی، ترجیحات سبک یادگیری و جنسیت بر بسندگی فراگیران ایرانی زبان انگلیسی انجام شد. برای این منظور، 154 فراگیر ایرانی زبان انگلیسی در این تحقیق شرکت کردند. سه ابزار جمع آوری داده ها شامل آزمون تعیین سطح بسندگی زبان انگلیسی آکسفورد، پرسشنامه ترجیحات سبک یادگیری براچ و پرسشنامه انگیزه و نگرش نسبت به یادگیری زبان انگلیسی به م...

Breed and Heterosis Utilization in Rotational and Composite Crosses