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Identification of versatile fertility restorer genotype(s) for diverse CMS lines of rice (Oryza saliva L)

机译：鉴定水稻（CMS）的不同CMS系的通用育性恢复基因型

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摘要

Thirty-five crosses, generated in a Line CHI Tester mating design involving seven CMS lines (belonging to 4 different cyto-sterile sources) and five restorer genotypes (each reported to be specific for a particular sterile cytoplasm), were evaluated to identify the pollen parent(s) having wide fertility restoration capacity. The restorers were ranked based on fertility percentages of the cross combinations following a specific scale. The genotype IR 71604-4-4-3-8-7-3-3-3 was found to have wide fertility restoration capacity and restored 80% or above fertility in four CMS lines. Ranking of restorers in cross combinations for grain yield and yield components was also carried out taking into consideration the statistical significance of difference between mean values. Following this innovative ranking procedure, the genotype IR 73885-1-4-1-3-6 got the top rank followed by IR 71604-4-4-3-8- 7-3-3-3. These two genotypes can form potential pollen parents for developing heterotic rice hybrids in combinations with CMS lines carrying diverse sources of cytoplasmic male sterility in different nuclear background.
机译：评估了在Line CHI Tester交配设计中产生的35个杂交，涉及7个CMS系（属于4个不同的细胞无菌来源）和5个恢复基因型（据报道每种均对特定的无菌细胞质具有特异性），以鉴定花粉。具有广泛的生育能力的父母。根据特定比例的交叉组合的育性百分比对恢复者进行排名。发现基因型IR 71604-4-4-3-8-7-3-3-3具有广泛的生育力恢复能力，并且在四个CMS系中恢复了80％或更高的生育力。还考虑到平均值之间差异的统计显着性，对谷物产量和产量成分的交叉组合中的恢复剂进行排名。按照这一创新的排名程序，基因型IR 73885-1-4-1-3-6排名第一，其次是IR 71604-4-4-3-8- 7-3-3-3。这两种基因型可以形成潜在的花粉亲本，用于与带有不同核背景的细胞质雄性不育来源的CMS系结合开发杂种水稻杂种。

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