Date
October 17-18, 2022 | 10:00 AM GMT
Location
Paris, France
Paris, France
Yusuf Leonard Henuk is a Professor in the Department of Animal Science, Faculty of Agriculture at the University of Sumatera Utara (USU), Medan, North Sumatera, Indonesia. He participated in the courses of Arabic Language and mainly Poultry Production and Health from 15 January 31 March 2008 organized by the Egyptian International Centre for Agriculture (EICA), Cairo, Egypt. He was a twice Visiting Professor at the Department of Poultry Science, Texas A&M University, College Station, USA (September December 2010& 2017). He was a prolific writer and has published many articles in international journals and mainly in poultry science, e.g. World Poultry Science Journal as well as international scientific meetings such as 3rd World Plant Genomics and Plant Science Congress Keynote Speaker July 15 16, Osaka, Japan; 15th Annual Conference on Crop Science and Agriculture Keynote Speaker 18-19 November 2019, Bali, Indonesia.
The objective of this study was to investigate the reproductive and morphological performances of stallions in the District of Karo, North Sumatera, Indonesia. Body measurements and semen were taken on 12 stallions from four villages in the District of Karo, North Sumatra, Indonesia. There were two villages in Merdeka Sub-district i.e. Jaranguda and Merdeka; and two villages in the Berastagi Sub-district, i.e., Gundaling and Berastagi. Data were entered in Microsoft excel, checked, organized, and processed for further analyses. Means with standard errors (SE) for different traits were subjected to the standard analysis of variance technique. The results showed that the semen quality of stallions performed in the macroscopic and microscopic examination was of good quality with the color of semen was white grey, neutral pH, 74% dilute, 73.3% motility, 13.40 x 107 concentration with their semen abnormalities observed were normal. The morphology characteristics of stallions in the District of Karo showed an appearance with a variation coefficient value below 10% which means the measurement value of horizontal horse morphology is in good condition. The results support horse breeders to cross-breed periodically their stallions with local horses in the District of Karo because their variation coefficient showed good quality semen with uniform value.
Xiwen Cai is currently working as a professor at the Department of Plant Sciences at North Dakota State University, North Dakota. His current research is on genomics-enabled chromosome engineering. He has completed his Ph.D. in Crop genetics at Washing State University.
Hexaploid-derived resistance genes exhibit complex inheritance and expression patterns in tetraploid backgrounds. This study aimed to characterize the inheritance patterns and genomic compatibilities of hexaploid-derived Fusarium head blight (FHB) resistance genes in tetraploid durum wheat (Triticum durum Desf.). Evaluation of FHB resistance for F1 hybrids of hexaploid ‘Sumai 3’ crossed with tetraploid and hexaploid wheat indicated that Sumai 3-derived FHB resistance genes exhibit a dominant phenotypic effect seen only in hexaploid hybrids. Alternately, the hexaploid-derived FHB resistance genes from PI 277012 exhibited complete dominance in the crosses with both tetraploid and hexaploid wheat. FHB evaluation of the F1 hybrids of Sumai 3 and PI 277012 crossed with ‘Langdon’ (LDN)– ‘Chinese Spring’ D-genome substitution lines suggested that chromosomes 2B, 3B, 4B, 5B, 6B, 3A, 4A, 6A, and 7A contain genes that suppress the expression of the Sumai 3-derived FHB resistance, whereas chromosomes 4A, 6A, and 6B contain genes required for expression of PI 277012-derived FHB resistance. A wide range of segregation for FHB severity (10–90%) was observed in the F2 generation of Sumai 3 crossed with durum cultivars LDN and ‘Divide’, but the distribution of F3 families derived from the most resistant F2 segregants was skewed towards susceptibility. Similar segregation trends were observed in the crosses of PI 277012 with other durum wheat, whereby FHB resistance became slightly diluted over successive generations. These results suggest tetraploid durum wheat contains the unique alleles at multiple gene loci on different chromosomes that positively and/or negatively regulate the expression of hexaploid-derived FHB resistance genes, which complicate efforts to deploy these genes in durum breeding programs.
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