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Strategies for Enhancement in Food Production
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In maize, hybrid vigour is exploited by
A
crossing of two inbred parental lines
B
harvesting seeds from the most productive plants
C
inducing mutations
D
bombarding the seeds with $DNA$
(AIPMT-2007)
Solution
(a): Hybridisation or heterosis or hybrid vigour is defined as superiority ofhybridover parents. It has been commercially exploited in different commercial crops like maize, sorghum, bajra, etc. The main steps include: selection of parents, selfing of parents, emasculation, bagging, crossing of desired and selected parents and finally seed setting and harvesting.
Standard 12
Biology
Similar Questions
Match the Column – $I$ with $II$
| Column $I$ | Column $II$ |
| $(1)$ Pusa Shubhra | $(a)$ Leaf and stripe rust |
| $(2)$ Pusa swarnim | $(b)$ Curl blight black rot |
| $(3)$ Pusa sadabahar | $(c)$ Chily mosaic virus |
| $(4)$ Himgiri | $(d)$ White rust |
Match following columns.
| Column $- I$ | Column $- II$ |
| $(a)$ Cross breeding | $(x)$ Jaya, Ratna |
| $(b)$ Interspecific hybridization | $(y)$ Saccharum barberi |
| $(c)$ Better – yielding semi – dwarf varieties | $(z)$ Hirsadale |
| $(d)$ South Indian variety of sugar cane | $(w)$ Mule |
| $(v)$ Saccharum officinarum |
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