(一)四倍体花粉与二倍体花粉的比较自交不亲和性的品种日向夏和八朔,由于用四倍体的日本夏橙花粉授粉,得到无核果,同时,与用二倍体的日本夏橙授粉的果实相比,所得到的果实,其大小和品质也并不差(山下、1976)。因此,对其他自交不亲和品种,用四倍体作为父本的杂交试验,自有其研究和利用的价值。 (A) Comparison of tetraploid and diploid pollen Inbred incompatibility of varieties to the summer and Ba Shuo, due to the use of tetraploid Japanese summer orange pollinated to obtain non-stone fruit at the same time, with diploid Japanese orange fruit pollination compared to the fruit obtained, its size and quality is not bad (Yamashita, 1976). Therefore, the self-incompatibility of other species, with tetraploid as a male parent hybridization test, its own research and utilization of value.