甘薯新品种金山679的选育及其高产机理研究

A Study on the Breeding of a New Sweetpotato Variety Jinshan679 and Its High-yield Physiological Characteristics

甘薯新品种金山679是以金山57和广薯87为亲本经杂交选育而成,表现高产、稳产、食味品质好。研究金山679的高产生理特性,结果表明:该品种在整个生育时期均维持较大的叶面积指数,保持较高的光合生产能力;同时块根库容大,接纳同化物质能力强,同化产物积累于块根的比例也较高。上述生理特性显示金山679具有较高的产量潜力,形成高产的生理基础。

A new sweet potato variety Jinshan679 was bred from the hybrid offspring of Jinshan 57 and Guangshu87. with high stable yield, good eating quality. The high - yield physiological characteristics of Jins- ban 679 were studied. The results showed that Jinshan 679 maintains a relatively high level throughout the whole growing period, therefore kept high photosynthetic production capacity. At the same time, the variety demonstrates stronger ability to accumulation with a higher sink capacity, and the ratio of assimilation production was higher in the tuberous roots. The variety had high resistance against drought. All the above showed the high - yield physiological basis and potential of the variety.