八优8号是浙江省农科院作物所与诸暨市种子公司合作育成的粳型杂交水稻新组合,2002年3月通过浙江省农作物品种审定委员会审定.表现产量高而稳,一般7.50～8.25 t/hm\+2,最高达10.71 t/hm\+2.生育期适中,适宜于浙江省晚粳稻地区作双季晚稻或单季晚稻栽培.抗病性好,中抗稻瘟病,对白叶枯病、细菌性条斑病和稻飞虱的抗性与当前的主栽品种秀水63相仿.其栽培要点为:适时播种;合理密植,科学施肥;加强病害防治,适期收获.

A thermo-sensitive seedling-colour mutant 7436S was detected in the field from a breeding nursery in China, in 1991, The experiments were conducted at artificially controlled temperatures (23.1 degreesC, 26.1 degreesC, 20.1 degreesC) in growth chambers. The results showed that the seedling colour of the mutant 7436S was white (23.1 degreesC), light yellow (26.1 degreesC) and normal green (30.1 degreesC) at 10 days after sowing and yellowish green (23.1 degreesC) and normal green (26.1 degreesC, 30.1 degreesC) at 20 days after sowing, respectively. It was concluded that its thermo-sensitivity decreased gradually with the increase of the seedling age. In addition, its thermo-sensitivity for seedling colour was oriented, as white seedlings turned green at high temperatures, but not in the opposite direction. If he segregation ratios in the F-2 populations showed that a recessive nuclear gene (tentatively designated as tsc-1) controlled the thermo-sensitive seedling-colour character. Based on genetic linkage and the recombination value (34.1%) between the tsc-1 gene and short panicle morphological marker (sp) gene in the F-2 generation, the results indicated that the tsc-1 gene was located on chromosome 11.

Xieyou 963 (Xieqingzao A×963) is a newly-developed indica hybrid rice combination by the Institute of Crops Research, Zhejiang Academy of Agricultural Sciences. Its restorer line 963 is derived from the cross of 92-7, an early-maturity, disease-resistant and wide-compatibility restorer line, and Wenhui 439, an indica restorer line. Xieyou 963 shows high-yielding potential, multi-resistance to diseases and insects and acceptable grain quality. It was registered and released to commercial production in Zhejiang in April, 2000. Its breeding procedure, characteristics and major cultural practices and hybrid seed production techniques were introduced in the paper.

协优９５１６ 是浙江省农科院作物所利用协青早不育系和９５１６ 恢复系配组育成的籼型杂交水稻新组合。经１９９５～１９９８ 年省内外的广泛试种和试验表明， 协优９５１６ 高产、稳产， 抗性和米质较好， 适宜于单季晚稻和双季晚稻栽种。１９９９ 年３ 月通过浙江省农作物品种审定委员会的审定。

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