求助,会英文的朋友帮忙翻译一下
CFW品种珍珠的遗传方式在下英文实在不行 用google翻译 有些基因和遗传的专业术语也翻译不好
请各路大神给翻译一下 大概的含义也行
就是CFW的遗传方式 是否伴性 是否为复合基因 等等
我理解为CFW与LB基因 是等位基因
且相对母鸟是伴性的 母鸟只可能有这两种基因中的一种
而公鸟可以携带两种基因 且LB相对CWF来说是显性?
不知道是否正确....
Combinations
The Chestnut Flanked White mutation is part of a multiple allelic series. What this means is that the CFW mutation shares the same location (loci) on the chromosome with the Lightback mutation and both varieties of CFW. They are all variations of the same mutation starting with the Regular CFW. Since they have the same chromosome location, they cannot be combined. Females are either CFW of one variety or another or Lightback. Males can carry the Lightback gene on one sex chromosome and CFW on the other. These birds will be Lightbacks as it is dominant to both forms of CFW, but will be visually different from birds that carry a Lightback gene on both chromosomes. Males can also carry one gene for each variety of CFW, as described above.
The combination with fawn requires a genetic phenomenon known as crossing over to occur before CFW and Fawn can be combined. Crossing over is a random occurrence so one cannot predict how long, if ever, before the combination will occur. Fawn-CFWs look similar to gray series CFWs, but all the black markings will be dark brown instead. Once combined the two mutations are linked and will act as one. Some sources have erroneously indicated that the Continental CFW was a combination of CFW and Fawn. This error is probably due to a belief that the cream cast to the back was caused by the Fawn mutation rather than the new mutation. There is also some evidence that points to a modifier gene that causes a cream cast to the back of Regular CFWs that is more commonly seen in CFW-Fawns. Again, this should not be confused with the Continental CFW mutation.
Both varieties of CFW can be combined with many other mutations with various degrees of attractiveness. Those that come to mind first are those mutations that alter the male markings in some way. Most fall short or the desired effect however and require that you have really strong and well marked CFWs to begin with. Often, CFWs are combined with Black Cheeks with the idea of producing a white bird with black markings. Sine the Continental variety shows stronger black markings, it may be a better choice to use in the combination. Some do not like the cream back however and try the combination with Regular CFWs. Most hens show reduced cheek patches rather than full ones and males that do show full cheeks often have orange flanks rather than black. The combination also produces gray rather than stark black markings as well. Still, they are very attractive birds when all the markings show as the breeder would like. The same line of thinking is also true for the Black Face mutation. Black Face males would show the black in front of the tear marks and the black extension of the breast bar. Like the combination with Black Cheek, the black is really a dark gray. Females would be difficult if not impossible to identify visually since the BF mutation has little effect on them. The combination with the Black Breasted mutation is also attractive since the enlarged markings of the male can be seen on the white base. The females resemble White Zebras, but can be identified by the black mark near the base of the beak. The CFW can be combined with the Orange Breasted mutation to change the breast bar to the same color as the cheek patches. The same amount of dilution seen in the cheeks will be seen in the breast bar as well. The only way to determine the combination in the hens is a light orange tear mark and bars on the tail. Otherwise, they are mostly white. Chestnut Flanked Whites are also quite attractive with the Yellow Beak mutation. The diluted beak and legs are quite attractive next to the white base color.
Being a dilute variety that relies on the contrast of the markings to be appealing, the CFW does not combine to great advantage with the other dilute varieties. This includes the Dominant and Recessive Silvers, Florida Fancy and Fawn Cheek. Between the dilution of the body color and the further dilution of the markings, the combination loses much of the appeal of the CFW. Some breeders have combined the CFW with the Florida Fancy to create a bird that has been referred to as Red Flanks and are similar to the Florida Fancy, but lack the buff underparts and the orange markings are diluted. I personally do not find this combination attractive, but some might. Also, other mutations whos appeal is in the contrast of markings, Pied and Penguin, are best not combined with the CFW.
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