Horticulture - Study Mode

[#806] GMS is exploited in the commercial hybrid seed production of
Correct Answer

(D) Musk melon

Explanation

Solution: GMS is exploited in the commercial hybrid seed production of Musk melon . GMS is Genetic male sterile and is exploited for commercial hybrid seed production for producing F1 hybrid seeds. Mono-genic recessive GMS is maintained by backcrossing it with a heterozygous isogenic line for male sterility. Therefore, in the hybrid seed production field, 50% of male fertile segregants need to be identified and removed before they shed pollen.

[#807] Type of fruit in Citrus spp. is
Correct Answer

(D) Hesperidium

Explanation

Solution: Type of fruit in Citrus spp. is Hesperidium . A hesperidium (plural hesperidia) is a modified berry with a tough, leathery rind. The outer ovary wall becomes the thick spongy layer of the rind, while the inner ovary wall becomes very juicy with several seeds. The peel contains volatile oil glands in pits. Oranges, lemons, limes and grapefruit are all common examples of hesperidia.

[#808] 1 st transgenic crop commercially cultivated in our country is . . . . . . . .
Correct Answer

(C) Cotton

Explanation

Solution: The first transgenic crop commercially cultivated in our country is Cotton . Bt cotton was approved by the Government of India in March 2002 as the first transgenic crop for commercial cultivation for three years. Bt cotton plants contain one or more foreign genes derived from the soil-dwelling bacterium, Bacillus thuringiensis. Apart from cotton, there are more than 20 crops under research and development in about 50 public and private sector organizations in India.

[#809] Flowering season of gladiolus is
Correct Answer

(A) Spring summer

Explanation

Solution: The flowering season of gladiolus is Spring and Summer . In areas having moderate climatic conditions, gladiolus can be grown throughout the year. Gladiolus can be grown in a wide range of climatic conditions. It can be grown from plains to an altitude of 2500 m. Gladioli grow from round, symmetrical corms that are enveloped in several layers of brownish, fibrous tunics. The flowers of unmodified wild species vary from very small to perhaps 40 mm across and inflorescences bear anything from one to several flowers.

[#810] Tetraploid variety of medicinal solanum is
Correct Answer

(B) Arka Mahima

Explanation

Solution: The tetraploid variety of medicinal solanum is Arka Mahima . 'Arka Sanjeevini' and 'Arka Mahima' are the two diploid and tetraploid varieties of this crop developed at the Indian Institute of Horticultural Research, Hessarghatta, Bangalore and released for cultivation. It is used as raw materials for the production of steroidal drugs, steroid-bearing solanum holds an important place due to its quick growth and low initial investment in its commercial cultivation. It yields a glycoalkaloid, solasodine, a nitrogen analogue of diosgenine.