A comprehensive report of the National Coordinated Varietal Trial (NCVT) of Cotton conducted during 2019-20 in National Cotton Varietal Testing Program

Muhammad Zahir Ahsan

Abstract


One hundred and two cotton cultivars, developed by the different scientists were grouped in four sets and tested at six locations in Punjab, four locations in Sindh, three locations in Balochistan and one location in KPK to test the adaptability of seed cotton yield. The quantitative and qualitative analysis of Bt toxin of these cultivars were conducted at four designated labs. The results revealed highly significant differences among the cultivars for seed cotton yield per hectare. In Set-A top performance cultivar is Saim-102 (2519kgha-1) followed by the Tahafuz 12 (2350kgha-1), in set-B Rustram-11 (2655kgha-1) and BF-1 (2288kgha-1) perform best as compared to the other cultivars. In Set–C cultivar, NIAB-1011 (2604kgha-1) and GH-Uhad (2531kgha-1) out yield the all other cultivars and in Set-D cultivar, Bt-CIM-775 (2588kgha-1) and Sahara-Klean-5 (2508kgha-1) surpass the yield from other candidate cultivars. Overall top varieties in Punjab, Sindh, Balochistan and National level were Rustam-11 (2484kgha-1), Sahara-Klean-5 (2714kgha-1), Diamon-2 (3742kgha-1), GH-Hamaliya (2594kgha-1), Rustam-11 (2655kgha-1),The average trait purity for BG-I (Cry1Ac) was 25 to 100%, for BG-II (Cry1Ac and Cry2Ab) none of the variety observed positive and for BG-III (Cry1Ac, Cry2Ab and RR) trait purity was 57 to 100%.


Keywords


National coordinated varietal trial, NCVT, biochemical tests, Bt toxin protein

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