【摘要】 广亲和中粳品系02428是江苏农科院1980年从高光效筛选的入选材料之间杂交的后代中选育而成。全生育期140天,具有良好的株型,穗大花多,结实率高。与不同类型的籼稻或粳稻杂交,F₁表现大部分结实率正常。与籼稻杂交的F₁结实率为59.95-88.73%,而且具有明显的杂种优势,多数组合在许多农艺性状上超过中亲值（MP）或高亲值（HP）₀在生物学特性上有两点比较突出: 其一是,“02428”酯酶同功酶的酶谱为1A、3A、4A、5A、7A（典型籼稻和粳稻的混合谱带型）。这种谱型在美国长粒品种与我国云南光壳稻品种中均易发现。需进一步证实这种谱型是否可作为筛选广亲和性种质的指标。 其二是,“02428”的净光合速率在变化光强下有较大的适应能力。用化学杀雄的方法,以籼稻为母本,以“02428”为父本配制了批量的F₁种子,大田试种产量可达725.1公斤/亩（早献党/02428）,这表明利用“02428”进行水稻亚种间杂优育种有令人鼓舞的前景。更多还原

【Abstract】 Rice selection 02128 （O. Sativa L Subsp.） was a germplasm resource with wide compatibility selected in a cross between mutants developed from a breeding program for high photosynthetic efficiency by Jiangsu Academy of Agricultural Sciences in 1980. Its growth duration is about 140 days. It possesses many desirable agronomical characteristics such as better plant type, large panicle with more spikelets, and high spikelet fertility.Normal seed setting rate can be obtained in F₁ in crosses of 02428 with a number of indica and japonica cultivars. The seed setting rate of F₁ hybrids in cross of 02428 with indica cultivars ranged from 59.95-88.73%, with an average 75.22%. The hybrids with japonica cultivars also showed a quite normal fertility, however,no obvious heterosis was observed.Two biological characters were outstanding in 02428. The first is its esterase isozymogram most of which consist of IA, 3A, 4A, 5A, 7A bands—a mixed nature of typical indica and japonica bands. The esterase isozymogram as in 02428 was found in most American long grain cultivars and glabrous "upland" rice in Yunnan province. Further studies are needed to identify if the esterase isozymogram could be used as a parameter for screening wide compatibility. The second is its higher photosyntheticrate under wide fluctuation of light intensity.Mass production of indica-japonica F₁ seeds was done by chemical emasculation of indica cultivar, using 02428 （japonica） as the male parent. Field experments showed the grain yield of the F₁ population was very promising and rewarding. Early xian dong /02428 hybrid produced 10876.5kg/ha （725.1kg/mu）.Some aspects on the ongoing projectes were also outlined.更多还原