Tag: improvement if crop varieties

Quizzes (0) Questions (42)

Questions Related to improvement if crop varieties

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

In crop improvement programme, haploids are important because they

  1. Require one half of nutrients

  2. Are helpful in study of meiosis

  3. Grow better under adverse conditions

  4. Form perfect homozygous individuals on diploidisation.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In crop improvement programme, haploids are important because they form perfect homozygous lines. Homozygous are the pure line selection plants resulting from self pollination. In this way, considerable homozygosity is obtained. Haploids are those plants which possess a gametophytic number of chromosomes. Haploids are used in plant breeding, especially for the production of homozygous plants and in their studies in the detection of mutation.

So the correct answer is ' Form perfect homozygous individuals on diploidisation'

Multiple choice biology improvement in food resources crop variety improvement improvement if crop varieties improvement in crop variety

Genetic diversity in agricultural crops is threatened by -

  1. Introduction of high yielding varieties

  2. Intensive use of fertilizers

  3. Entensive intercropping

  4. Intensive use of biopesticides
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The widespread adoption of high-yielding, uniform varieties leads to the replacement of local landraces, thereby reducing genetic diversity.