【摘要】 X单倍体型蜂类的性别决定机制,一是X染色体含X基因的数量小于常染色体组含的Y基因,而且各X染色体含X基因的数量不相同;二是性型结构为开放型,各X染色体含的X基因有相加作用,各常染色体组含的Y基因没有相加作用;在性型结构和性基因数量双重机制作用下,由有效数量大的X基因或Y基因决定性别。二倍体雄蜂和二倍体雌蜂之间的差异,只是两条X染色体含X基因的数量之和不相同,并无纯合子和杂合子之别,不存在纯合子为雄蜂,杂合子为雌蜂的问题。蜜蜂的遗传育种理论,应和其它雌雄异体生物相同。更多还原

【Abstract】 The mechanism of x haploid bee sex determination was,first,x gene quantity with x chromosomes not only was less than Y genes with euchromosomes,but also x gene quantity with every x chromosme was different ;second ,the structure of sex type was open ,and x genes with chromosomes possessed additivity,but y genes with euchromosomes didn’t posses such characteristic.The structure of sex type and the quantity of x genes together determinde sexuality and the x genes or y genes with great effect-ual quantity determined sexuality.The difference between diploid mole bees and diploid female bees was the quantitative difference of the x genes with x chromosomes,and there wasn’t not only the only the difference of homozygote and heterozygote but also homozygote was male bees and heterozygote was female bees.Theory of bee genetic breeding was identical wiht other bisexal bionts.更多还原