How Koshihikari was used

The 99 offspring of Koshihikari, divided by the type of cross. The division follows how the primary sources write the seed and pollen parents. How many fall into each type is also a distribution of how the sources are written.

"Cross parent (seed or pollen not stated)" is the largest group because the variety registration database writes "crossing A with B" and does not use the words seed parent or pollen parent. By convention A is taken to be the mother, but since it is not written in words, this site does not assert it.

The six groups reflect how far each source goes. Of the 99 recorded children of Koshihikari, only 23 are described in words as mother or father — 13 as the seed parent and 10 as the pollen parent. For 55 there is nothing but the slash in a cross combination, and the remaining 21 are 19 mutations and 2 backcrosses. A source that does not say which parent was which is not being careless; the habit of recording it was never uniform. So this site does not fill the gap by inference, and counts the silence as a group of its own. The figures in this paragraph come from the data, so they change as the record grows.

Children of Koshihikari