Performing multiple pollinations using a glassine bag:If a large number of pollinations are to be made on a single day from one pollen source (as many as 100 pollinations may be made from one tassel) the best procedure is as follows: prepare a glassine bag (2" x 7 ½ " [5 x 19 cm] ) by making a "Z"-shaped fold in the bag about halfway up the length of the bag. Then pour in the contents of the tassel bag. Sift the pollen past the first fold into the bottom fold, taking care to keep the anthers in the top from where they may be discarded. Turn the bag on its side and tear off the upper of the two bottom corners of the bag. Carry the pollen in this bag to the waiting silks where it may be sifted sparingly through the torn corner of the glassine bag into the top of the torn shoot bag covering each ear. Then fold the shoot bag to protect the pollinated silks and move rapidly to the next ear. Speed is essential here because the pollen will remain viable only a short time. Fresh pollen appears light yellow and will flow freely from the glassine bag. If the pollen becomes deeper yellow or clumps together these are signs that it is no longer viable (collectively speaking even though there may be some viable grains mixed among the majority of unviable ones). A pre-written tassel bag can be left between the shoot bag and the stalk (culm) (this bag is secured later). The pre-written information on the tassel bag should comprise the relevant information (identity) of the host plant bearing the ear (sometimes referred to as the female plant) and the identity of the pollen -producing plant (sometimes referred to as the male plant). Notes about the pollination and the date may also be written on the bag. After all pollinations from one source are completed then there is time to go back and place the tassel bags over the ears and staple
đang được dịch, vui lòng đợi..