Horticulture - Study Mode

[#246] Male sterility in onion was first located by HA Jones is the year
Correct Answer

(A) 1925

Explanation

Solution: Male sterility in onion was first located by H. A. Jones in the year 1925 . Male sterility in plants implies an inability to produce or release functional pollen and is the result of the failure of the formation or development of functional stamens, microspores or gametes. In onions (Allium cepa L.), cytoplasmic male-sterility (CMS) has been widely used in hybrid seed production. Two types of CMS (CMS-S and CMS-T) have been reported in onions.

[#247] Headquarter of AICVIP is located at
Correct Answer

(C) IIVR, Varanasi

Explanation

Solution: The headquarters of AICVIP is located at IIVR, Varanasi . The All India Coordinated Research Project on Vegetable crops was started during the fourth five-year plan in 1970 - 71, to provide a national network for multi-location testing of vegetable technologies. In a significant development in 1991, headquarter of the directorate was shifted from IARI, New Delhi to Varanasi. Later on, the PDVR was elevated to the Indian Institute of Vegetable Research (ICAR-IIVR) in 1999.

[#248] Pusa Kesar is the variety of
Correct Answer

(D) Carrot

Explanation

Solution: Pusa Kesar is a variety of carrots . Pusa Kesar is developed at the IARI, New Delhi. It has red-coloured roots and self-coloured core. It can tolerate higher temperatures. Suitable for sowing from August - early October. The crop matures in 90 - 110 days with an average yield of 30 t/ha. The carrot variety Pusa Kesar can be left in the field 1 month longer than the variety Local without bolting and produces significantly fewer forked roots with a higher carotene content. The seed crop matures 15 days later than that of Local.

[#249] Tomato hybrid developed using male sterile line is
Correct Answer

(A) Pusa Divya

Explanation

Solution: Tomato hybrid developed using the male sterile line is Pusa Divya. The functional male sterility has been exploited for hybrid seed production of tomato cv. Pusa Divya. The use of male sterility reduces the cost of hybrid seed production for several reasons. It avoids hand emasculation and pollination, accelerating the hybrid breeding programs and allowing the large-scale production of hybrid seeds and the commercial exploitation of hybrid vigor. Pusa Divya F1 matures in 70 - 90 days after transplanting. It yields firm fruits with thick skin. The fruits are round to oval in shape, and about 16 fruits will weigh one kg. This hybrid is tolerant to late blight and bucket rot diseases.

[#250] Yellow leaf disease of Arecanut is caused by
Correct Answer

(A) MLO

Explanation

Solution: Yellow leaf disease of Arecanut is caused by MLO . MLO is a Mycoplasma like organism, found in the young sieve elements of areca nut palms declining with yellow leaf disease in Kerala and Karnataka States. It causes yellowing of the tips of the leaflets. And it extends to the middle of the lamina. Tips of chlorotic leaves dry up. Finally, the crown leaves fall off leaving a bare trunk. Root tips turn black and gradually rot.