Department of Plant Breeding, International Rice Research Institute, Los Baños, Philippines.
Theor Appl Genet. 1985 Aug;70(5):467-73. doi: 10.1007/BF00305978.
The genetics of submergence tolerance in rice was studied in a 10 × 10 half-diallel cross set involving 10 lowland rice varieties, four of which were tolerant ('FR13A', 'FR43B', 'Kurkaruppan', and 'Goda Heenati') and the remaining six were nontolerant ('RD19', 'IR42', 'IR17494-32-1', 'IR19672-24-3', 'Jagannath', and 'CR1009'). Estimates of genetic parameters following Hayman's method showed significant additive and nonadditive gene action and the latter appeared to be solely due to dominance. Narrow sense heritability (0.70) indicated that additive gene effects were more important in the inheritance of the trait. Tolerance was dominant over nontolerance and the average dominance was within the range of incomplete dominance. Dominant alleles were more concentrated in the three tolerant parents, 'FR13A', 'Kurkaruppan', and 'FR43B' in that order. Wr/Vr graphic analysis suggested the involvement of both major and minor genes. Combining ability analysis by Griffing's method also indicated significance of both additive and nonadditive effects, and the former appeared to be more important than the latter. The hybrids involving 'FR13A' with 'RD19', 'IR42', and 'IR17494-32-1', and those of 'Kurkaruppan' with RD19' and 'CR1009' appeared to be promising for incorporating an adequate level of tolerance to submergence into lowland rice cultivars.
对水稻耐淹水的遗传基础进行了研究，该研究使用了一个包含 10 个低地水稻品种的 10×10 半双列杂交组合，其中 4 个品种（‘FR13A’、‘FR43B’、‘Kurkaruppan’和‘Goda Heenati’）为耐淹水品种，其余 6 个为非耐淹水品种（‘RD19’、‘IR42’、‘IR17494-32-1’、‘IR19672-24-3’、‘Jagannath’和‘CR1009’）。根据 Hayman 方法估计的遗传参数表明，存在显著的加性和非加性基因作用，后者似乎仅由显性作用引起。狭义遗传力（0.70）表明，在该性状的遗传中，加性基因效应更为重要。耐淹水对非耐淹水表现为显性，且平均显性度处于不完全显性范围内。显性等位基因更集中在 3 个耐淹水亲本‘FR13A’、‘Kurkaruppan’和‘FR43B’中，顺序依次为。Wr/Vr 图形分析表明，主要和次要基因都参与了该过程。Griffing 方法的配合力分析也表明，加性和非加性效应都很重要，且前者似乎比后者更为重要。涉及‘FR13A’与‘RD19’、‘IR42’和‘IR17494-32-1’，以及‘Kurkaruppan’与‘RD19’和‘CR1009’的杂交种似乎有希望将适度的耐淹水能力引入低地水稻品种中。
