论文部分内容阅读
玉米穗上部籽粒在进入干物质积累盛期之前经常不实。这些籽粒重量减少从而最终不能形成可收获的籽粒产量。进入干物质积累盛期的穗上部籽粒一般要比中、下部籽粒晚授粉2～4。天因为它们干物质积累率降低和积累时间缩短,故成熟时粒重较低。最近研究表明,7个自交系和15个杂交种的不实籽粒幅度为0.6～12.4%,每株可能减产6%。如了解了穗上部籽粒不能正常发育的原因就可增加穗粒数和穗粒重。
The upper ear of the ear of corn is often false until it reaches the peak of dry matter accumulation. The weight of these kernels is reduced and ultimately fails to yield a harvestable grain yield. Into the earliest dry matter accumulation of ear upper grain than the middle and late grain pollination 2 to 4. Because of their lower dry matter accumulation rate and shorter accumulation time, grain weight is lower at maturity. Recent studies have shown that the false kernels of 7 inbreds and 15 hybrids range from 0.6 to 12.4%, with a yield reduction of 6% per plant. As to understand the upper part of the panicles can not be the normal development of the reasons can increase the number of grains per spike and grain weight.