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发掘米草耐盐和水稻高产种质资源,创制耐盐粳稻新种质。在2005—2007年米草与水稻远缘杂交研究的基础上,2008—2009年开展了海涂耐盐粳稻新种质创制研究。2008年海涂种植耐盐适应性试验,米草/水稻杂交种34号、32号,产杂交种子3.72t/hm2。2009年海涂筛选结合分子标记辅助双选择,32个组合中,产耐盐稻谷3.0 t/hm2以上的有20个组合,平均产稻谷4.89t/hm2,最低产稻谷3.11 t/hm2,最高产稻谷8.94 t/hm2。选育出了产量在6.0～7.5 t/hm2耐盐粳稻新组合6个。发现了耐盐甜秆粳稻种质资源育种材料,秸秆可溶性糖含量在5.0%以上,比对照水稻提高65%以上。在60份杂交材料中选择18个杂交组合,经RAPD分析,有9个组合具有与大米草亲本共同条带,而同时在水稻亲本中缺失的情形,表明9个组合远缘杂交种具有大米草亲本遗传成分。
Salt scythe and high-yielding rice germplasm resources were explored to create new salt-tolerant japonica rice germplasm. On the basis of the distant hybridization between rice grass and rice from 2005 to 2007, a new research on the creation of new salt-tolerant japonica rice germplasm was carried out in 2008-2009. In 2008, the salt tolerance of the tideland planting experiment was tested. The rice grass / rice hybrid 34 and 32 hybrid seed 3.72t / hm2. In 2009, 32 combinations of salt tolerant rice There were 20 combinations with more than 3.0 t / hm2. The average yield of rice was 4.89 t / hm2, the minimum yield of rice was 3.11 t / hm2 and the highest yield of rice was 8.94 t / hm2. Six new combinations of salt-tolerant japonica rice with the yield of 6.0-7.5 t / hm2 were bred. The salt-resistant sweet stalk japonica rice germplasm resources breeding material was found. The soluble sugar content of straw was above 5.0%, which was more than 65% higher than that of the control rice. Among the 60 hybrids, 18 hybrids were selected. According to RAPD analysis, 9 combinations had the common band with the parents of S. albiflorus, but were missing in the rice parents at the same time. Parents genetic components.