Genetics And Plant Breeding - Study Mode
[#206] Exanthema in citrus' tress is a reserves of the deficiency of
Correct Answer
(A) Copper
Explanation
Solution: Exanthema in citrus trees is a reserve of the deficiency of Copper. The branches, especially the terminal ones, the leaves, and the fruit are all attacked. As a general rule, there is no apparent effect on the roots. The symptoms of exanthema are variable. Severely affected trees carry a large quantity of dead wood. The dropping, blemishing and cracking- of fruit form one of the most common symptoms. Brown glossy areas occur particularly on one side of the fruit. The surface may show small dots of gum. Copper treatment may take two forms. The trees may be sprayed with a weak Bordeaux mixture, preferably at blossoming time.
[#207] N. E. Borlaug was awarded Nobel Prize in
Correct Answer
(A) 1970
Explanation
Solution: N. E. Borlaug was awarded Nobel Prize in 1970. He was an American agronomist who led initiatives worldwide that contributed to the extensive increases in agricultural production termed the Green Revolution. Borlaug was awarded multiple honors for his work, including the Nobel Peace Prize, the Presidential Medal of Freedom and the Congressional Gold Medal. Borlaug received his B. S. in forestry in 1937 and Ph.D. in plant pathology and genetics from the University of Minnesota in 1942.
[#208] Which one of the following methods of plant breeding is not being used in cross-pollinated crops?
Correct Answer
(B) Recurrent selection
Explanation
Solution: Recurrent Selection is one of the following methods of plant breeding that is not being used in cross-pollinated crops. Recurrent selection means repeated cycles of selection and breeding aimed at the gradual genetic improvement of a few key traits in a single species. The benefits of breeding are cumulative in that each cycle or generation of improvement builds upon advances made in prior generations.
[#209] Pusa Gold is a new variety of
Correct Answer
(B) Wheat
Explanation
Solution: Pusa Gold is a new variety of wheat. It was released in the year 2005 for Delhi NCR region. It is suitable for irrigated late and very late sown conditions. Fits well in intensive cropping systems. Average seed yield is 37.3 q/ha. It possesses genes for thermo tolerance and leaf rust resistance.
[#210] The method used to break the unfavourable linkage is
Correct Answer
(D) Diallele selective mating
Explanation
Solution: The method used to break the unfavourable linkage is Diallele selective mating. The concept of a diallele selective mating system was originally developed by Jensen in 1970. He used this system for genetic improvement of wheat. It is a method of population improvement of autogamous species that involves parental diallele series, F1 diallele series and selective mating series in the breeding procedure.