Genetics And Plant Breeding - Study Mode
[#341] Oat is a . . . . . . . . pollinated crop.
Correct Answer
(A) Self
Explanation
Solution: Oat is a self-pollinated crop. oats, (Avena sativa), domesticated cereal grass (family Poaceae) grown primarily for its edible starchy grains. Oats are widely cultivated in the temperate regions of the world and are second only to rye in their ability to survive in poor soils. The oat is a winter cereal crop native to the Mediterranean region. It's a self-pollinated crop with a limited range of diversity.
[#342] Substitution haploids are represented as
Correct Answer
(C) n - 1 + 1
Explanation
Solution: Substitution haploids are represented as n - 1 + 1. Haploids deficient for one chromosome of the normal gametic complement of the species are known as nullisomic haploids and those having one or more alien chromosomes substituted for one or more chromosomes of the haploid complement are known as substitution haploids.
[#343] Transpiration through leaves is known as
Correct Answer
(C) Foliar transpiration
Explanation
Solution: Transpiration through leaves is known as Foliar transpiration. Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. Leaf surfaces are dotted with pores called stomata, and in most plants, they are more numerous on the undersides of the foliage. Thus, the loss of water that happens from the leaf surface through stomata and cuticles is termed foliar transpiration.
[#344] A maintainer line is
Correct Answer
(D) Male fertile but cannot restore fertility
Explanation
Solution: A maintainer line is Male fertile but cannot restore fertility. A male fertile line is known as the maintainer line or 'B' line and 'the male sterile line is also known as 'A' line. In a maintainer line (M), its cytoplasm is male fertile (normal) which interacts with a recessive male-sterile nuclear gene to jointly perform male-fertile phenotype.
[#345] Horizontal resistance is also referred to as
Correct Answer
(D) All of the above
Explanation
Solution: Horizontal resistance is also referred to as Minor gene and general resistance, Polygenic resistance, and Quantitative resistance. Genetic resistance that is effective at preventing successful attack only by certain races of a pathogen is called specific resistance, whereas resistance that is effective at preventing successful attack by all races of a pathogen is called general (or horizontal) resistance. Polygenic resistance acts retarding the rate of development of the epidemic rather than delaying its onset. Quantitative resistance can refer to an incomplete or partial level of resistance phenotype.