Effect On Ewe Productivity Of Crossbreeding Booroola Merino And Rambouillet Sheep And An Investigation Of Linkage Between The Booroola Fecbeta Gene And Blood Polymorphisms

Author : R. B. Land
Publisher : Butterworth-Heinemann
ISBN 13 :
Total Pages : 448 pages
Book Rating : 4.:/5 (89 download)

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Download or read book Genetics of Reproduction in Sheep written by R. B. Land and published by Butterworth-Heinemann. This book was released on 1985 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt: Genetic variation and selection; Selection for litter size; Crossbreeding for fecundity; Evaluation and utilization of finn sheep; The performance of romanov crosses and their merits as a basis for selection; Genetic studies of reproduction in norwegian sheep; Crossbreeding for fecundity in subrtropical sheep; The fecundity of the chios sheep; Prolific breeds of goat; Reprodutive physiology in south american camelids; Genetic and maternal effects on sheep reproduction and their influence on selection; Improvement of reproductive performances in rasa aragonesa. Present results in selection and crossbreedin experiments; The preliminary results of selection for prolificacy in polish merino sheep; The inheritance and effects of the booroola gene; The single gene inheritance of the high litter size of the booroola merino; The productivity of bungaree, booroola X bungaree and trangie fertility X bungaree merino ewes in south Australia; Introduction and management of the booroola gene in sheep flocks in New Zealand; Genetic strategies for single genes; Utilization of major genes; Single genes for fecundity in icelandic sheep; Principles and practice for the use of the booroola merino in extensive husbandry; Linear programming model for incorporating the booroola gene into another breed; Physiololgy of genetic variation; Breed differences in ovulation rate and uterine efficiency and their contribution to fecundity; Contribution of variation in ovulation rate and embryo survival to within breed variation in litter size; The mechanism of action of genes controlling reproduction; Reproductive endocrinology of prolific sheep: studies of the booroola merino; Ovulation rate and oestrus in booroola genotypes; some effects of age, season and nutrition; Sexual and ovarian function of the D'man ewe; Folliculogenesis in sheep: control of ovulation rate; Physiological criteria for embryo mortality: is asynchrony between embryo and ewe a significant factor?; Physiological criteria in genetic selection for aseasonality; Parameters of male fertility and their genetic variation in sheep; FSH plasma levels in male and female lambs issued from lacaune rams with high or low prolificacy index; Physiological criteria of genetic merit; Detection and genetic assessment of physiological criteria of meritr within breeds; Testis size and LH response to LH-RH as male criteria of female reproductive performance; Heritabilities of testis size and sexual behaviour in males and their genetic correlations with measures of female reproduction; Nutritional requirements and systems of husbandry; Protein, energy and ovulation rate; Nutritional requirements of the pregnant and lactating ewe; The possibilities for improving the performance of ewes suckling three or more lambs in grazing systems; The utilization of romanov sheep in a system of integrated husbandry; Productivity of booroola cross merinos in western Australia; Intensive husbandry of fecund sheep; Index.