gamma-ray induced mutant cultivar of Dahlia (Dahlia variabilis), developed and released through induced mutation breeding by the National Botanical Research Institute (CSIR-NBRI), Lucknow.
Features distinctive purple-crimson blooms with novel floral petal margins.
Correct Option: Option 2 (Dahlia).
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2
ICAR JRF Floriculture And Landscaping 29 Jun 2024Shift 1
MCQ (Single Correct)+4−1
The rose cultivar ‘Pusa Barahmasi’ developed from cv. ‘Sadabahar’ through which of the following breeding method?
'Pusa Barahmasi' Rose: A continuous-blooming, hardy floribunda rose cultivar bred at the Division of Floriculture and Landscaping, ICAR-IARI, New Delhi.
Breeding Method: Developed through clonal selection from the open-pollinated seedling population of the popular variety cv. 'Sadabahar'.
Traits: Bears clusters of cheerful pink blooms practically round the year ("Barahmasi") under subtropical north Indian plains.
Correct Option: Option 4 (Selection).
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3
ICAR JRF Floriculture And Landscaping 29 Jun 2024Shift 1
MCQ (Single Correct)+4−1
Which of the following mutagenic agent is used for the development of ‘Zenith’ variety of alstroemeria ?
One of the most famous large-flowered, intermediate-incurved exhibition cultivars in India, producing luminous golden-yellow blooms.
Developed as a spontaneous bud sport (somatic mutation) from the pristine white exhibition cultivar 'Snowball'.
Bud Sports in Chrysanthemum: Somatic mutations in ray floret carotenoid/anthocyanin pigmentation pathways frequently give rise to elite cultivars without altering overall incurved floral architecture.
Correct Option: Option 4 (Snowball).
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5
ICAR JRF Floriculture And Landscaping 29 Jun 2024Shift 1
MCQ (Single Correct)+4−1
What is the ploidy of rose variety ‘Mohini’ which is a chocolate brown in colour and patented in USA?
Bred by legendary Indian agricultural scientist Dr. B.P. Pal at IARI, New Delhi from a seedling of 'Sea Pearl'.
World-famous for its rare, warm chocolate-brown / russet-colored blooms and holds a US Plant Patent.
Cytogenetic Constitution:
Detailed cytogenetic investigations confirmed that 'Mohini' is a trisomic aneuploid ($2n + 1 = 29$, having an extra chromosome added to the standard tetraploid rose complement $2n = 4x = 28$).
Correct Option: Option 2 (Trisomic).
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