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研究高粱雄性不育系恢复结实的原因,对提高不育系的育种成效和指导生产,以及对雄性不育的机理探讨是很有意义的。高粱雄性不育系在某些年份里,由于气候反常,往往会出现花药膨大、变黄,以至散粉结实等恢复现象。由于恢复的部位不同,可分为以下3种情况:①单性花雄蕊发育。有的不育系只是有柄小穗内的单性花(雄蕊)发育散粉,这种花粉多数发育正常,一般能授粉结实,这类不育系的不育性不稳定,易恢复。②两性花雄蕊发育。有的不育系有柄小穗不发育,而是无柄小穗两性花的花药膨大、变黄或散粉。这种花
Studying the reason of the sorghum male sterile line resuming its fruiting is of great significance to improve the breeding effect of the sterile line and guide the production as well as the mechanism of male sterility. In some years, the male sterile lines of sorghum tend to regain anther swelling, yellowing and loose powder due to the abnormal weather. Due to the different parts of recovery, can be divided into the following three kinds of situations: ① unisexual flower stamen development. Some male sterile spikelets only within the unisexual flowers (stamens) development of scattered powder, most of this pollen normal development, pollination and generally can be strong, sterile sterility of these types of instability, easy to recover. ② bisexual flowers stamen development. Some sterile pedicel spikelet is not developed, but sessile spike bisexual flower anthers dilated, yellow or loose powder. This flower