Question

why is it that anthesis, emasculation and actual crossing are preferably done early in the morning or late afternoon​

Answer 1

Answer:

It is essential to prevent self-pollination as well as chance cross-pollination in the flowers of the female parent. The seeds as well as the progeny resulting from the hybridization are known as hybrid or F1. ... In most self-pollinated crops, F1 is more vigorous and higher yielding than the parents.

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Answer 2

Answer:

In plants crossing is done by placing pollen grains from one genotype the male parent on to the stigma of flowers of the other genotype, the female parent. It is essential to prevent self-pollination as well as chance cross-pollination in the flowers of the female parent.