Horticulture MCQ Question and Answer | Agriculture MCQ Question

Paradox is a rootstock of Plum Walnut.
Rootstocks are bred to grow in different soil types and conditions and provide the best anchorage, vigor and resistance or tolerance to soil borne pests and diseases.
Paradox seedlings are more vigorous and less susceptible to Phytophthora root rot but very susceptible to crown gall.

Cabbage (Brassica oleracea var capitata) is a small, leafy biennial producing a compact globular mass of smooth or crincled leaves wrapped over each other known as head. The outer leaves are generally larger than the inner. The stem is short and stout. Plants flower generally after winter.
The seed required to raise seedling for planting of one hectare crop of cabbage is 400 - 500 gm.
Prior to sowing seeds are treated with fungal culture of Trichoderma viride (4 g/kg of seed) or Thiram (3 g/kg of seed) to avoid damage from damping-off disease.

Bleached ginger is treated with Lime solution.
Bleached ginger is produced by dipping scrapped fresh ginger in a slurry of slaked lime, Ca(OH)₂, (1 kg of slaked lime/120 kg of water) followed by sun drying. As the water adhering to the rhizomes dry, the ginger is again dipped in the slurry. This process is repeated until the rhizomes become uniformly white in colour.
Liming gives ginger a better appearance and less susceptibility to the attack of insect pests during storage and shipping.

Colour blindness genes are located on X chromosomes. It follows X-linked recessive inheritance.
Colour blindness is the decreased ability to see colour or differences in colour. It can impair tasks such as selecting ripe fruit, choosing clothing, and reading traffic lights.
Colour blindness is a sex-linked disease. This means it is a gene that occurs only on the X chromosome, which is passed to the child by the mother. The Y chromosome, which is passed to the child by the father, does not carry the defective gene.

Controlled atmosphere storage of fruits and vegetables maintains higher concentration of carbon dioxide than the normal atmosphere.
A controlled atmosphere is an agricultural storage method in which the concentrations of oxygen, carbon dioxide and nitrogen, as well as the temperature and humidity of a storage room are regulated. Both dry commodities and fresh fruit and vegetables can be stored in controlled atmospheres.

First time cytoplasmic genetic male sterility is used in Onion.
Background. Joseph Gottlieb Kölreuter was the first to document male sterility in plants. In the 18^th century, he reported on anther abortion within species and specific hybrids. It is total or partial male sterility in plants as the result of specific nuclear and mitochondrial interactions.
Cytoplasmic male-sterility (CMS) has been used in F1 hybrid seed production in onion (Allium cepa L.). Two types of CMS (CMS-S and CMS-T) have been reported in onions. Almost complete mitochondrial genome sequences of normal, CMS-T and CMS-S cytoplasm types have been obtained in previous studies.

The cultivated carrot (daucus caroto L.) has a chromosome number of 2n = 18.
The carrot is a diploid species and has nine relatively short, uniform-length chromosomes (2n = 18). The genome size is estimated to be 473 mega base pairs.
The cytogenetic characterization of the carrot genome (Daucus carota L., 2n = 18) has been limited so far, partly because of its somatic chromosome morphology and scant of chromosome markers.

Food preservation can be defined as the process of treating and handling food in such a way as to stop or greatly slow down spoilage and prevent foodborne illness while maintaining nutritional value, texture and flavour.
In food preservation colour is added to make food more attractive, appealing, appetizing, and informative. In preservation of food 200 ppm of colour is permitted.

Blanching is a cooking process in which a food, usually a vegetable or fruit, is scalded in boiling water, removed after a brief, timed interval and finally plunged into iced water or placed under cold running water (known as shocking or refreshing) to halt the cooking process.
Blanching foods helps reduce quality loss over time.
Enzymes are inactivated in produce by Blanching. Heat treatment and blanching is the simplest and direct method of enzyme inactivation.

Isolation distance for production of certified seeds of okra is 200 m.
Isolation distance is the minimum separation required between two or more varieties of the same species for the purpose of keeping seed pure.
Isolation prevents unwanted cross-pollination and is the primary practice required to keep varieties true to type. Isolation begins with an understanding of the distance required to limit or eliminate chances of cross-pollination between two varieties of the same species.