Quality differences between NILs of wheat variety Longmai 20 possessing HMW-GS 7OE + 8* and 17 + 18

Zhao, H. B. and Gao, C. J. and Song, W. F. and Zhang, Y. B. and Gao, D. D. and Zhang, X. M. and Zhao, L. J. and Yang, X. F. and Liu, D. J. and Song, Q. J. and Zhang, C. L. and Xin, W. L. and Xiao, Z. M. (2020) Quality differences between NILs of wheat variety Longmai 20 possessing HMW-GS 7OE + 8* and 17 + 18. CEREAL RESEARCH COMMUNICATIONS, 48 (4). pp. 493-498. ISSN 0133-3720 (print), 1788-9170 (online)

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Abstract

In order to determine the genetic diferences between high-molecular weight glutenin subunits (HMW-GS) 7OE+8* and 17+18, HMW-GS 7OE+8* from a Canadian extra-strong wheat cultivar Glenlea was introduced to Longmai 20 (1, 17+18, 5+10) by 6 consecutive backcrosses with biochemical marker-assisted selection. The near-isogenic lines (NILs) of Longmai 20 possessing HMW-GS 7OE+8* and 17+18 were grown in the experimental feld of the Crop Breeding Institute of Heilongjiang Academy of Agricultural Sciences from 2006 to 2009. The feld experiments were conducted in a two-column contrast arrangement with four replicates. Compared with the NILs possessing subunits 17+18, the quality parameters of NILs with subunits 7OE+8* , which include protein content, dry gluten content, ratio of wet gluten/dry gluten, ratio of Zeleny sedimentation/dry gluten, stability, maximum resistance and area of extensogram, increased by 1.5% (P=0.06), −0.7% (P=0.47), −1.9% (P<0.01), 6.6% (P=0.02), 11.2% (P=0.6), 20.3% (P<0.01) and 19.9% (P<0.01), respectively. HMWGS 7OE+8* have a greater positive efect on the rheological properties of four, such as the maximum resistance and area of extensogram, which are less infuenced by environmental conditions compared to stability of Farinogram.

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