Advantage ;
Self pollination maintains the parental characters .
It is used to maintain pure lines for hybridization experiment .
It ensured seed production .
Flowers do not develop devices for attracting insect pollinators .
It eliminates some unwanted recessive characters .
Disadvantages ;
New useful characters are rarely introduced .
Immunity to diseases decrease.
Variability is not seen so adaptability to changed environment are reduced .
Vigour and vitality of the race decreases with prolonged self pollination .
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