温室冬繁水稻低温敏核不育系原种方法的初步研究

PRELIMINARY STUDY ON MULTIPLICATION OF PEDIGREE SEEDS FOR TGMS LINES OF RICE AT LOW CRITICAL TEMPERATURE IN GREENHOUSE IN WINTER

摘要:

１９９５年１—５月，在广州利用玻璃温室加温冬繁籼型水稻低温敏核不育系培矮６４ｓ和ＧＤ－２ｓ原种．当不育系进入育性转换敏感期时，温室室温调控至日均温约２３℃，检查花粉育性和自然结实率，结果表明，培矮６４ｓ的结实率为５０．７％，单株产量平均为３．５ｇ．培矮６４ｓ原种温室冬繁的成功，为现有种量少、繁种难、提纯复壮株严格的低温敏核不育系加速世代扩大繁殖系数提供了一种可靠的途径．

Abstract:

Two thermoperiod-sensitive genie male sterile(TGMS) lines of rice, Pei-ai 64s and GD-2s, were grown in greenhouse for multiplication by means of heating from January to May, 1995. When the TGMS lines were in the sensitivity stage of fertility alteration, the mean daily temperature in the greenhouse was controlled at 23 ℃. After heading, their pollen fertility was monitored by dricroscope and the seed setting rates were checked. The results showed that the seed setting rate of Pei-ai 64s reached 50.7%, its individual plant yield was averagely 3.5g. The multiplication of pedigree seeds for Pei-al 64s grown in the greenhouse in winter was successful. It is proved that seed being multiplied in the greenhouse in the winter is a better way to expedite the reproduction of TGMS lines at low critical temperature.