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为了测定不同桃品种对裂果的敏感性,筛选抗裂果种质资源,为育种工作提供理论依据,作者于1998年5～8月果实八成熟时调查了重庆市果树研究所种质资源圃里36个品种(系)的裂果数和正常果数,计算裂果率和裂果指数。 结果表明:36个品种(系)中,发生裂果的有25个,占69.4％。其中对裂果较不敏感的品种有8个,裂果率为3.9％～9.8％,裂果指数为0.01～0.05;较敏感的品种有8个,裂果率为11.8％～28.6％,裂果指数为0.05～0.15;敏感的品种5个,裂果率为33.3％～44.8％,裂果指数为0.18～0.22;极敏感的品种4个,裂果率为57.1％～85.7％,裂果指数为0.10～0.27。对裂果不敏感的品种(系)有二元桃、6-3、6-4等。 分析结果表明,不同成熟期的桃品种裂果程度
In order to determine the susceptibility of different varieties of peach cracking fruit, screening germplasm resources of anti-cracking fruit, provide a theoretical basis for breeding work, the author in May 1998 to August eight fruit ripening survey of fruit trees in Chongqing Institute of Resources 36 A variety of varieties (lines) the number of the number of cracks and the normal number of fruit, fruit cracking rate and crack index calculation. The results showed that among the 36 cultivars (lines), 25 were found, accounting for 69.4%. Among them, 8 cultivars were less sensitive to split fruit, the fruit split rate was 3.9% ~ 9.8% and the fruit split index was 0.01 ~ 0.05. There were 8 more sensitive varieties, the fruit split rate was 11.8% ~ 28.6%, the fruit split index was 0.05 ~ 0.15; the susceptible varieties were 5, the fruit cracking rate was 33.3% ~ 44.8%, the fruit cracking index was 0.18 ~ 0.22; 4 very sensitive varieties, the fruit cracking rate was 57.1% ~ 85.7%, the fruit cracking index was 0.10 ~ 0.27. Insect cracking of the varieties (lines) with two peaches, 6-3,6-4 and so on. The results showed that the cracking degree of peach varieties at different maturity stages