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Grain Quality Aspect Indicates Hybrid Rice Development Concern to Indigenous Inbred Varieties

Grain Quality Aspect Indicates Hybrid Rice Development Concern to Indigenous Inbred Varieties

Rauf Ahmad1, Karam Ahad2 and Aziz Ullah Shah3

1Plant Sciences Division, Pakistan Agricultural Research Council, Plot # 20, Sector G-5/1, Islamabad, Pakistan; 2Ecotoxicology Research Institute, NARC, Park Road, Chak Shezad, Islmabad, Pakistan; 3Director Land Resources, Natural Resource Division, Pakistan Agricultural Research Council, Plot # 20, Sector G-5/1, Islamabad, Pakistan.

Email: rauf.ahmad1966@yahoo.com

ABSTRACT

Abstract | Milling, physical and cooking quality of candidate hybrid varieties of fine and coarse rice category, were tested for their performance against the respective standards. In hybrid category, 58% candidates milling quality found excellent or good (head rice yield– HRY 51-70%), 23% marginal (HRY 40 – 50%) and 18% below limit (< 40%). Physically, 60% samples were extra-long size, slender shape and coarse type. Nineteen percent samples were long or medium size but slender shape and coarse type as well. Whereas, 21% sample were short or medium size only. Regarding cooking quality, 60% samples were excellent or good and 30% were OK (poor quality). The cooking quality of 10% sample was very poor. Overall 50% candidate varieties were excellent or good and 16% were OK whereas only 23% were below standard limit. In fine category, milling quality of only 6% candidates was excellent or good. Both fine and coarse candidates showed 13% and 7%poor milling, while 80% and 69% were under limit respectively. Physically, 19% candidates’ from fine category were long size (length 6.1-7.0 mm), considered good and 63% OK. However, 19% candidates were medium size (length 5.0-6.0 mm) below the respective standard (≥ 6.1 mm). Cooking quality of fine category was OK. Overall grain quality of 6% samples graded excellent, 19% well or OK and 56% candidates were below standard. Physically, 7% candidates from coarse category were extra-long size, ranked well and 43% OK while15% was below the standard. Cooking quality of coarse candidates was OK however overall, 21% samples showed poor milling, and physical and cooking quality and 36% did not meet the standard. Ratio of hybrid, fine and coarse candidates obtained for onward protocol was 43%, 24% and 0% respectively. The overwhelming of hybrid candidates with good quality indicates that they have common source, origin and or different brands of the same company.
 

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Pakistan Journal of Agricultural Research

June

Vol. 30, Iss. 2, Pages 122-208

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