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南大2419是我国小麦育种的骨干亲本之一。为了了解南大2419对衍生品种(系)HMW-GS的贡献,本研究利用SDS-PAGE技术对南大2419及其99个衍生品种(系)的HMW-GS组成与演变进行了分析。结果表明,南大2419 HMW-GS组成为N/7+8/2+12,品质得分7分。衍生品种(系)的平均品质得分7.62分,高于亲本南大2419;其中N/7+8/2+12组合的品种占45.45%,且该类型在每一代都是优势组合。南大2419 HMW-GS在后代中得到了较好的遗传,在子一代到子四代中,Null、7+8、2+12亚基出现的频率均高于50%,最高可达100%。衍生品种(系)中,12个大面积推广的品种都具有与南大2419相同的丰产性高、适应性好和抗性强的优点,但HMW-GS均不是优质组合。说明骨干亲本南大2419由于本身品质上的局限,对其衍生品种在品质遗传改良上的贡献很小,其主要贡献是传递丰产性状。
Nanda 2419 is one of the key parents of wheat breeding in China. In order to understand the contribution of Nanda 2419 to HMW-GS, the composition and evolution of Nanda 2419 and its 99 derivatives (lines) were analyzed by SDS-PAGE. The results showed that the composition of Nantah 2419 HMW-GS was N / 7 + 8/2 + 12 with a score of 7. The average quality score of the derivative varieties (lines) was 7.62 points, higher than that of the parent Nanda 2419. The varieties with N / 7 + 8/2 + 12 combinations accounted for 45.45%, and this type was the dominant combination for each generation. Nanda 2419 HMW-GS was well inherited in the offspring. Null, 7 + 8 and 2 + 12 subunits appeared more than 50% and up to 100% from the first generation to the fourth generation. Among the derivative varieties (lines), 12 large-scale popularized varieties have the same high yield, good adaptability and strong resistance as Nanda 2419. However, HMW-GS is not a good combination. This indicates that the backbone parent Nanda 2419 has little contribution to the genetic improvement of its quality due to its own quality constraints, and its main contribution is the transfer of high yield traits.