Describe various factors involved
in cross-Pollination.
Answers
Cross-pollination may then be brought about by a number of agents, chiefly insects and wind. Wind-pollinated flowers generally can be recognized by their lack of colour, odour, or nectar and their stigmas that are arranged to optimize the capture of airborne pollen.
Explanation:
Cross-pollination is the process of applying pollen from one flower to the pistils of another flower. Pollination occurs in nature with the help of insects and wind. This process can also be done by hand to produce offspring with desired traits, such as colour or pest resistance.
To cross-pollinate it is necessary to prepare two different roses that are at a similar stage of development. In general, in contrast to diploid roses which are mostly self-incompatible, tetraploid roses are self-compatible. To prevent self-pollination of the selected seed parent, the anthers (pollen sacs) must be removed from the blooms before any pollen is released . This is best accomplished at sunrise when blooms are in the one-third to one-half open stage. First, all of the petals are removed. This procedure allows better access to the centre of the flower. Next, with tweezers or small scissors, the anthers are removed. If the variety selected as a seed parent will also be used as a pollen parent with other roses, the anthers may be collected in a cup and placed uncovered in a dry place where they will mature and release pollen by the next day . After this operation of emasculation has been performed, the remaining portion of the bud is covered with a white paper bag to prevent unwanted pollen from reaching the stigmas.