Genetics And Plant Breeding MCQ Question and Answer | Agriculture MCQ Question

For transferring the disease resistance gene from the wild variety to the most suitable agronomically desirable variety the suitable method is Back cross.
Backcrossing is the plant breeding method most widely used to incorporate one or a few genes into an elite or adapted variety.
In this method, the parent used for backcrossing has a large number of desirable attributes but lacks a few characteristics.

The growth regulator that retards ageing of plant organs is Cytokinin.
cytokinins are an important regulatory factor of plant meristem activity and morphogenesis, with opposing roles in shoots and roots.
It promotes cell division and increases cell expansion during the proliferation and expansion stages of leaf cell development, respectively.

The back cross method of breeding can be used for the Intervarietal transfer of simple inherited characters, this statement given above is correct.
Backcrossing is the plant breeding method most widely used to incorporate one or a few genes into an elite or adapted variety.
Backcross breeding enables breeders to transfer a desired trait such as a transgene from one variety (donor parent, DP) into the favored genetic background of another (recurrent parent, RP).

In cotton, an example of durable resistance includes resistance to Bacterial blight, leaf curl and jassids.
Bacterial blight is a widespread soybean disease that is most common during cool, wet weather. This disease usually occurs at low levels that don't result in yield loss.
Curling leaves can be caused by many problems, including insect damage, disease, abiotic disorders, or even herbicides. Several insect pests cause leaves to curl when they suck plant juices of new or young leaves that are still growing.
Cotton jassids are sap-sucking pests of cotton and several other host plants.

The primary acceptor of CO₂ in C₃ plants is RuBP.
Ribulose 1,5 -bisphosphate (RuBP) is an organic substance that is involved in photosynthesis, notably as the principal CO₂ acceptor in plants.
It is a colourless anion, a double phosphate ester of the ketopentose (ketone-containing sugar with five carbon atoms) called ribulose.
During photorespiration, RuBP combines with O₂ to become 3-PGA and phosphoglycolic acid.

In maize, resistance to European corn borer is associated with High DIMBOA in leaves.
DIMBOA is a powerful antibiotic present in maize, wheat, rye, and related grasses, DIMBOA was first identified in maize in 1962 as the "corn sweet substance".
Etiolated maize seedlings have a very sweet, almost saccharin-like taste due to their high DIMBOA content.

The fruit type of mustard is Siliqua.
Silique is any dry fruit that separates at maturity into two or four segments called valves, leaving a persistent partition that bears the seeds.
It is a type of fruit (seed capsule) having two fused carpels with the length being more than three times the width. When the length is less than three times the width of the dried fruit it is referred to as a silicle.
The valves remain connected at the top. A typical silique is an elongated capsule, such as in cabbage.

The Azure blue tag is given for Certified seeds.
The progeny of foundation seed is produced by registered seed growers under the supervision of seed certification agencies to maintain the seed quality as per minimum seed certification standards.
A blue colour certificate is issued by a seed certification agency for this category of seed.

The male sterile line is represented as A-line.
Male sterility is characterized by nonfunctional pollen grains, while female gametes function normally.
Inability to produce or to release viable or functional pollen as. a result of the failure of formation or development of functional.
CMS technology relies on three lines: the male sterile line (A) line, the cognate maintainer line (B) line, and the restorer line (R) line.
A line is a line or population which is male-sterile. Whereas the B line is a male fertile line or population capable of maintaining male sterility.

Flowers having both androecium and gynoecium are Hermaphrodites.
A hermaphrodite is an organism that has both kinds of reproductive organs and can produce both gametes associated with the male and female sexes.
A bisexual flower or hermaphrodite flower possesses both male (pollen-producing) and female (seed-producing) parts.