不同播种密度对亚麻温敏雄性不育系生长和育性的影响

Effects of different planting density on the growth and fertility of thermo-sensitive male-sterile line in flax

以亚麻温敏雄性不育系1S为材料,采用不同播种密度试验,研究了不同播种密度对亚麻温敏雄性不育系生长和育性的影响。结果表明,不同播种密度对亚麻温敏雄性不育系生长具有一定的影响,主要表现在随播种密度的增加,不育系终花期和成熟期延长,株高的增长减缓,工艺长度增加,单株果数减少;单株开花数量明显减少,但是开花前期花数占总花数的比例显著增加;但不同密度对不育系的花粉育性没有显著影响。因此,可以通过调节密度来调整不育系的花期和单株开花数等性状,以便在一定程度上克服花期过长或气候不稳定引起育性不稳定的不利影响。

The thermo-sensitive male-sterile line 1S of flax was studied with different planting density.The results indicated that the growth of thermo-sensitive male-sterile line in flax was affected by different planting density.With the increasing of planting density,the florescence and maturity was delayed,the increase of plant height was slowed in the same growth period,and the number of fruit and flowers per plant was decreased.However,pollen fertility was not obviously affected by planting density.We concluded that the flowering period and the number of flowers per plant could bechanged by planting density, thereby, the adverse effects of the fertile instability were overcome to some extend in thertoo-sensitive male-sterile flax.