Sixteen cucumber cultivars with different adaptability to low temperature and weak light were employed. Indexes on photosynthesis,physiology and biochemistry,morphology under low temperature and weak light were measured.Efficient early stage identification method and evaluation system for low temperature and weak light adaptability were deve- loped and used in the germplasm selection.The stability,operability,selection pressure and standardization of the evaluation system were discussed.

The relation between clubroot resistance genes and fertility genes in Chinese cabbage were studied .

ability of main characters of muskmelon fruit was analyzed by 15 cross combinations which were made with 6 muskmelon parents by the method of Griffing Ⅳ.The results showed that the fruit weight,the sugar content,the flesh thickness and the shape exponent were controlled by additive and non-additive heredity components.The fruit weight,the sugar content and the shape exponent were mainly controlled by additive effect but the flesh thickness was mainly controlled by non-additive effect.M-14 could be...Combining ability of main characters of muskmelon fruit was analyzed by 15 cross combinations which were made with 6 muskmelon parents by the method of Griffing Ⅳ.The results showed that the fruit weight,the sugar content,the flesh thickness and the shape exponent were controlled by additive and non-additive heredity components.The fruit weight,the sugar content and the shape exponent were mainly controlled by additive effect but the flesh thickness was mainly controlled by non-additive effect.M-14 could be...

The experiments of water absorbing rate,seed germination among different water contents,among different germination beds and on vertical boards,and mucosa extractant produced during eggplant seed germinating treatment with eggplant varieties Liuyeqie and Zhongchang No.1 were conducted.The results showed that mucosa doesn t hamper water enter seed;when the abundance of water increased,the mucosa got thicker,the germination rate reduced.In order to remove mucosa,sand bed could be used as germination bed.

This article studied the effects of different nitrogen amount on the growth,yield and quality of spinach.Results indicated that the growth of spinach strengthened,the yield increased with nitrogen amount increasing.But the excess of nitrogen decreased yield.The yield reached 48.3 t·hm~ -2 when nitrogen amount was 0.6 t·hm~ -2 ,but it was only 45.0 t· hm~ -2 when nitrogen amount was 0.9 t·hm~ -2 ,88.0 % and 75.3 % higher than CK respectively.Nitrogen could reduce the spinach dry matter,cellulose,organic acid...

Jinglv No.2 is a new pakchoi hybrid developed by two self-incompatibility lines Y07 and Y31.The plant is 21 cm in height and 31 cm in width.The leaf is dark green and the petiole is green with 3.8 cm in width and 0.8 cm in thickness.It has high resistance to virus,resistance to downy mildew and black leaf spot rot,tolerance to high or low temperature and high humidity.The average plant weight is about 0.24 kg and its yield is 37.5 t·hm~ -2 .

A new variety of Chinese cabbage Xinsiji was bred by crossing two self-incompatible lines 021 and 035.It has light-green leaves with hairless,wide and white petioles.It is resistant to virus,tolerance to downy mildew.It can be harvested in 25-40 days after sowing.Its total yield is 32.5-52.5 t·hm~ -2 .It is especially suitable for cultivation in summer.

Longyuanxiuchun is a new cucumber F_1 hybrid developed by crossing two inbred line 72-12 and 56-8.The plant has short node.The fruits grow in both main and branch vine.The fruit is straight,sweet and crispy,22 cm in length,3.6 cm in diameter,has light green skin with few white spines.It takes 46 days from sowing to first harvest,It is high resistant to fusarium wilt,resistant to downy mildew.

Yannong No.1 is a new cucumber F_ 1 hybrid developed by crossing two inbred lines A-3-5-1-2-5-7 which was selected from Haiyangbaihuanggua as a female parent and B-3-5-4-5-1-8 which was selected from Yantaibaiyu as a male parent.It has stronger resistance to downy mildew,powdery midew than Haiyangbaihuanggua and Luhuanggua No.3,tolerance to low temperture and weak light.Its fruit is about 20 cm in length and 3.5 cm in diameter and 100-120 g in weight.Its skin is smooth and white-green with luster.

The F2 population including 144 individuals used for this research was derived from the resistance inbred line Perennial and the sensitive inbred line 83-60.A genetic linkage map of pepper was constructed based on this F2 population by using JoinMap 3.0.This map consists of 12 main linkage groups,covers 429.02 cM,includes 54 AFLP markers,15 RAPD markers and 1 SSR marker.The average interval distance is 6.13 cM,each linkage group distance is 4.30-85.85 cM.Two QTLs identified on group 4 are significant resist...

Taking the improved male-sterile line of Korean white radish as the experimental material,the characteristics of growth,blossom and fruiting and the progress of backcross breeding about the VMS01,VMS02,VMS03 and VMS04 were studied.Moreover,we had bred the male-sterile line VMS01-98-16 with early-maturity,VMS03-96-07,VMS03-01-36 and VMS04-01-36 with bolting-resistance and corresponding maintaining lines VL-98-16,VL-96-07,VL01-36.The rates of male-sterile plants all could come to 100 %,flowers unfolded normal...

Citrullus lanatus ssp.vulgaris var.megalaspermus Lin et Chao; Zhongxin No.1 red-seed watermelon; Germplasm resources; Fusarium wilt; Somaclonal variation; Resistance; Selection in vitro; Evaluation with detached leaves;

Carbohydrate(raffinose,sucrose,glucose,and fructose)and soluble protein in 18 sample from 8 host plant species of Frankliniella occidentalis were measured.Most species of host plant examined contained a higher ratio of soluble protein to carbohydrate,with the maximum ratio was 1 627.00 and the minimum was 2.71.Mature leaves contained higher levels of soluble protein and carbohydrate than those of new leaves.Within pepper plant,the preferred feeding flowers of the thrips contained higher levels of soluble pr...

Five species vegetable seeds treated with different seed coating agents were used to investigate the effects on the seed germination,seed infection rate and seedling growth.The results indicated that Apronmaxx and Celest seed coating agents could be used with lower seed infection rate in Lilv cauliflower,Jingjiao No.1 pepper and Zhongnong No.7 cucumber,and had no effect on seed vigor;but these two seed coating agents could inhibit the seed germination and seedling growth of Xiayubai radish and Qiulv 60 Chin...