简介:(1)配种后3d切忌喂料过多,日喂料量以1.5~1.8kg为宜,若过多会降低产仔数。(2)分娩后3d仔猪容易冻死、冻伤、压死、病死等,应注意科学接产护理,做到保暖防潮,一定要让初生仔猪吃上初乳,以小排前、大排后,固定好奶头。第3d及时补铁、补硒防止贫血。对子母猪应防止产后感染,注射产后康针剂预防。尤
简介:Aspontaneousmutation,tentativelynamedd63,wasderivedfromthetwin-seedlingprogeniesofricecrossedbydiploidSARIIIandMinghui63.Comparedwithwild-typeplants,thed63mutantshowedmultipleabnormalphenotypes,suchasdwarfism,moretillers,smallerflagleafandreducedseed-settingrateand1000-grainweight.Inthisstudy,twoF2populationsweredevelopedbycrossingbetweend63andNipponbare,d63and93-11.Geneticanalysisindicatedthatd63wascontrolledbyasinglerecessivegene,whichwaslocatedontheshortarmofchromosome8,withinthegeneticdistanceof0.40cMfromRM22195.Hence,D63mightbeanewgeneastherearenodwarfgenesreportedontheshortarmofchromosome8.