hybrid seed

The main results are as follows: 1. From 2006 to 2009, a new bacterial disease with dry rot symptom on stalks has frequently occurred in the maize hybrid seed production fields in Xinjiang and Gansu provinces, China.

本文对该病害进行了详细的研究，主要结果如下：1.从2006到2009年，干茎腐病在新疆、甘肃玉米制种地父本PS056茎秆上连续发生。

From the view of comprehensively consideration the hybrid seed yield and the quantity factors, the optimum ratio between parental line was 1 ∶ 4 by using pistillate line of Balsam pear to product seed.

综合考虑制种产量与制种质量，利用苦瓜强雌系制种，其最适行比为1∶4。

Silk vigor is an important trait that effects hybrid seed production and hybrid production in maize.

花丝活力长短在一定程度上影响着玉米制种产量和杂交种产量,对玉米生产具有重要意义.

Germination percentage of hybrid seed F 1 is normal and its seedlings grow promisingly.

F1杂交种子发芽率正常，秧苗生长旺盛；

The methods of hybrid seed production by using genetic male sterile lines and their corresponding restorers bad been studied.

利用选育成的芝麻雄性核不育系及相应恢复系，研究以现蕾至始花期花药特征为标记获得全不育的芝麻两系法制种效果。

Compared to the conventional method, hybrid seed production will save 40% of the cost and the outcrossing rate will reach 100%.

应用辣椒雄性不育系繁制一代杂交种子比常规去雄繁种节省工本40%，杂交率达到100%。

Therefore, the most appropriate method was the artificial emasculation. ( 3) Experimental results showed that in order to obtain the highest possible rate of hybrid seed, we should choose emasculation and pollination at the same day.

紫花苜蓿杂交授粉实验表明，为获得尽可能高的杂交结实率，应选择去雄后当天授粉更为合适。

The Analysis of Study on the Benefit of Three Artificial Pollination Methods in Cotton Hybrid Seed Production

杂交棉人工制种不同授粉方法的效益分析

Molecular Identification Technology of Parents of Hybrid Rice Based on Its Hybrid Seed

基于杂交水稻种子鉴别其亲本的分子检测技术