Methods for Improving Hybrid Seed-setting Rate of a Potato Cultivar Linshu 17

[Objective] This study aimed to explore methods for improving hybrid seed-setting rate of a potato cultivar Linshu 17. [Method] L0527-4 was taken as male parent and Linshu 17 was taken as female parent to breed a new potato cul- tivar, so as to take advantage of the excellent characters of Linshu 17. [Result] The optimum pollination time of Linshu 17 was 10：00-12：00 am or after 04：00 pm. Spraying 10 mg/L of 2, 4-D, 50 mg/L of gibberellin or 20 mg/L of 6-BA ＋ 50 mg/L of gibberellin once every 7 days since the 3^rd day after hybridization all could im- prove the hybrid seed-setting rate of Linshu 17. [Conclusion] The hybrid seed-setting rate-improving effect of 2, 4-D sprayed on the 3^rd d after hybridization was best for Linshu 17. This study will provide technical references for other varieties to improve the hybrid seed-setting rate.

提高马铃薯品种临薯17号杂交结实率的方法研究

[目的]探索提高马铃薯品种临署17号杂交结实率的方法。[方法]以L0527-4为父本,以临薯17号为母本配制杂交组合,以期运用临薯17号的优良性状。[结果]]临薯17号的最佳授粉时间为上午10：00~12：00或下午4：00之后,杂交后第3天,喷施10 mg/L的2,4-D、50 mg/L的赤霉素、20 mg/L的6-BA＋50 mg/L赤霉素在马铃薯孕蕾期间,每隔7 d喷洒植株,这3种处理方法均可提高临薯17号的杂交结实率。[结论]杂交后第3天喷施10 mg/L的2,4-D提高临署17号杂交结实率效果最优。该研究可为其他材料提高杂交结实率提供技术借鉴。

马铃薯新品种临薯17号选育报告

临薯17号(原代号临9706-2)是临夏回族自治州农业科学研究所1996年以"抗疫白"作母本,"NW174-2"作父本,通过有性杂交系统定向选育而成。在2004—2006年省区试中,平均折合产量30 530.0 kg/hm2,较对照品种渭薯1号增产95.4%。该品种株型直立,株高65 cm,生育期122 d,花冠紫色,块茎椭圆形,白皮白肉,芽眼数少而浅,商品薯率85%以上,块茎含干物质267.6 g/kg、粗蛋白27.38 g/kg、粗淀粉198.2 g/kg、维生素C 131.2 mg/kg、还原糖3.52 g/kg。适宜在甘肃高寒阴湿及二阴地区、干旱、半干旱地区推广种植。