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水稻大穗大粒育种日益引起国内外研究者的重视,作为实现产量新突破的主攻目标之一。日本从意大利品种中选育出的“阿陆J10号”,千粒重45.5克,在每亩22.8万穗的情况下,亩产稻谷达到1784.1斤;他们用“太宝”与“长香稻”杂交育成的BG_1千粒重达52.0克,据称是目前世界上首屈一指的大粒稻种。IRRI的部分育种学家和植物生理学家,也在加紧进行大粒品种的选育,目前粒重已提高到50毫克。他们认为,提高粒重是今后进一步提高产量的重要途径,粒重若能由25—30毫克增加到50毫克,产量可提高30％。国内不少单位也相继取得一定成果,有的侧重于大穗(多粒),有的侧重于
Large-spike large-grain rice breeding has aroused the attention of researchers at home and abroad, as one of the main goals to achieve a new breakthrough in yield. In Japan, “Alu J10” was bred from Italian breeds with a grain weight of 45.5 grams. With 228,000 spikes per mu, the yield per mu of rice reached 1,784.1 kg; and they used the hybrid of “Tai Bao” and “Long Aromatic Rice” The bred BG_1 weighs 52.0 grams and is said to be the world’s leading large-sized rice seed. Some of IRRI’s breeders and plant physiologists are also stepping up breeding of large-grain varieties, which have now been raised to 50 mg. In their opinion, increasing the grain weight is an important way to further increase the output in the future. If the grain weight can be increased from 25-30 mg to 50 mg, the yield can be increased by 30%. Many domestic units have also achieved some succession, and some focus on the big spike (multi-grain), and some focus on