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Outline
This study aimed to estimate the genetic parameters and genomic breeding values of “Min Gai” cashmere goat hair traits， compare the effects of GBLUP and Bayes methods on the accuracy of genomic breeding value prediction of hair traits of “Min Gai” cashmere goat， and provide a reference basis for optimising the genetic selection and breeding strategy of “Min Gai” cashmere goats. This study took the fleece traits of 847 “Min Gai” cashmere goats as the research object and used GBLUP， Bayes A， Bayes B， Bayes C， and Bayes LASSO to estimate the genetic parameters and genomic breeding values of fleece traits （fleece length， cashmere length， cashmere diameter， and cashmere yield）. Furthermore， the accuracy of the genomic breeding value estimates was evaluated using five-fold cross-validation. The results showed that the heritability of fleece length estimated by the 5 methods was 0.11-0.32， the heritability of cashmere length was 0.14-0.33， the heritability of cashmere diameter was 0.17-0.49， and the heritability of cashmere yield was 0.16-0.32. There was a strong positive genetic correlation between cashmere length and fleece length， with a correlation coefficient of 0.48-0.84. The genetic correlation between other traits was relatively small， ranging from -0.06 to 0.46. The genomic breeding value accuracy estimated by the GBLUP， Bayes A， Bayes B， Bayes C， and Bayes LASSO methods for fleece length， cashmere length， cashmere diameter， and cashmere yield were 0.623 4-0.950 9， 0.626 2-0.953 0， 0.830 8-0.953 1， and 0.741 8-0.961 4， respectively. The genomic prediction accuracy of each trait estimated by the Bayes method was significantly higher than that estimated by the GBLUP method， and the Bayes B method had the highest genomic prediction accuracy， reaching 0.950 9-0.961 4. In summary， the Bayes B method is recommended for the genomic selection of “Min Gai” cashmere goats， which may accelerate the genetic progress of the population.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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