Wild peanut species have proven to be an important germplasm resource. The objective of this study was to characterize interspecific crossability among 3 cultivars and 5 wild species of the peanut. Hybrids were acquired from crosses among three cultivars and five wild diploid species, respectively. A. sylvestirs A. Chev. evidenced the highest degree of crossability among the three cultivars. In the Valencia type, the combination of A. hypogaea L. cv. IT187846 and A. sylvestirs A. Chev. formed 32.7% pegs. Pods were developed in 98.8%, and seeds were produced at a rate of 49.4%, a higher percentage than was observed with the Virginia or Spanish types. Peg formation from pollinated flowers was increased by 18.4∼62.1% via the application of GA3, as opposed to the 26.3∼34.7% control value. The combination of A. hypogaea L. cv. Daekwang and A. batizocoi Krapov. & W. C. Gregory resulted in 93.9% peg formation. Seeds set in 24.2∼26.9% from the pegs, representing a 4.2∼16.3% increase over the 10.8∼24.3% control values. As the result of GA3 treatment of flowers after pollination, the peg emergence ratio increased significantly, but seed formation increased only by a small amount. The pods of the interspecific hybrid were smaller than those of A. hypogaea L. cv. Daekwang, and a portion of the pod had immature seeds or abnormal seeds. Via PCR-RAPD method, we were able to determine that the exotic DNA had been integrated from A. batizocoi Krapov. & W. C. Gregory to A. hypogaea L. cv. Daekwang.

The genus Arachis L. is distributed widely throughout South America. This genus encompasses 80 described species, and 31 species belong to section Arachis, which is divided into diploid and tetraploid species. The objective of this study was to determine the morphological characteristics and genetic relationships among A. hypogaea L. cv. Daekwang and thirteen germplasms, using RAPD techniques. Peanut plants were cultivated in pots (1.2×0.8 m2) with clay loam in a glass-covered greenhouse and genetic relationship was identified by DNA polymorphisms using PCR. Thirteen germplasms bloomed between June 18th and June 25th, the majority of which bloomed 3∼10 days later than Daekwang (June 15th). The leaf size of A. batizocoi Krapov. & W. C. Gregory was similar to that of Daekwang, three germplasms, A. monticola Krapov. & Rig., A. paraguariensis Chodat & Hassler, and A. dardani Krapov. & W. C. Gregory, were bigger than Daekwang, but the others were smaller. Twelve germplasms evidenced peduncle longer than those of A. hypogaea L. cv. Daekwang. All of the seeds of the germplasms were smaller than those of Daekwang (76.2 g), and the weight of 100 mature seeds ranged from 6.0∼36.1 g in sections Arachis, Erectoides, Procumbentes, and Heteranthaes. The genetic relationship distance was determined among Daekwang, A. sylvestris, A. monticola, and A. batizocoi.

Peanut (Arachis hypogaea L.) mutants were induced by the gamma ray with 300 Gy of Co-60 irradiation using the seed of cultivar Shinnamkwang. BTM3-9 and BTM5-19 lines were selected in M₃ generation and then segregated. In M₈ generatio

Peanut (Arachis hypogaea L.) mutants were induced by the gamma ray with 300 Gy of Co-60 irradiation using the seed of cultivar Shinnamkwang. BTM3-9 and BTM5-19 lines were selected in M3 generation and then segregated. In M8 generation, the yield potential

A new peanut variety “Dakwang (Arachis hypogaea L.)” was developed from the cross between Suwon80 and ICG11 at the National Honam Agricultural Experiment Station(NHAES) in 2001. This variety has Shinpung type and erect growth habit with large size obovate

Poongmi is the first ginger variety developed by pure line selection from 54 Korean local accessions. The selected pure line having high quality and high yielding was tested for regional adaptation, and it was superior to those traditional accessions in g

Growth analysis was conducted with three diff erent growth types of sesame to compare the growth characteristics among types and to obtain the basic information for breeding high yielding sesame. Dif ferent growth types showed dif ferent rate of inrease i

To find out the relationship between pod development and cytokinin contents during reproductive stage of peanut, the cytokinin contents, trans-zeatin ribo-side (t-ZR) and dihydrozeatin riboside (diZR), were investigated at 0, 7, 14, 21 and 28 days after flowering (DAF). The amounts of t-ZR and diZR in cotyledon and first branch among primary branches were 3, 448 pmol/g (FW) and 4, 824 p/g (FW), respectively, which were higher than those of other branches. The t-ZR and diZR contents of lower parts on the branch from cotyledon node at 7 DAF were 579 pmol/g (FW) and 2, 028 pmol/g (FW), respectively, which were higher than those of upper parts. The cytokinin contents of reproductive organs as flowering progressed were increased at 0 and 14 DAF on branch and position of node. The cytokinin contents of upper part with pruning the lower part on the branch from cotyledon node were high 112-337% at 7 DAF and 14 DAF compared with those of the control. In case of remove the upper part of the first internode on main axis, t-ZR contents was 4.7 times higher than diZR contents at 7 DAF. The pod setting rate of flower and position on the branch from cotyledon node was closely related to the cytokinin contents during floral reproductive stage.

The seedlings of yacon (Polymnia sonchifolia Poeppig ＆ Endlicher), which were cuttings, plug seedling (PS), crown bud before sprouting (CBBS), crown bud after sprouting (CBAS), and divided seedling after budding (DSAB) were planted at 70~times 50 cm planting distance on ridge; that was interow spacingintrarow spacing, and about 28,500~pm 71 plants/ha. CBBS didn't need work and equipment to raise seedlings. PS and DSAB grew taller to 140.5 and 143.3cm, respectively, than others at 150 days after planting. In the changes of plant height, PS and DSAB showed taller than others during growth period, cuttings, CBBS, and CBAS grew rapidly in middle growth stage. Excepting main stem and petiole length, other characters were significant for seedling. Fresh weights were different among seedlings. Even though the yield of plants grown from CBAS and CBBS were lower with 34.7 and 36.4 ton/ha, respectively, than 3.6 ton/ha of DSAB; its yield index were over 95%, hence, those of plants grown from cutting and PS were lower with 73 and 87%, respectively. The ratio of tuberous roots over 200g to total tuberous roots per plant was the highest from DSAB. Most of tuberous roots were under 200g per tuberous root from cuttings. CBBS, CBAS, and DSAB are suitable to use seedlings for high yield of yacono. Yacon plant by DSAB much produced tuberous root of over 200g.

‘Goryeo-jihwang’ is a new variety of Rehmannia glutinosa LIBOSCH developed at Jinan Perennial Herbs Experiment Station from 1995 to 1999 and registered as a new cutivar in 1999 which is selected from Andong local population. This variety could be characte

Sword bean belongs to the subgenus Canavalia in the genus Canavalia. White and reddish varieties in sword bean were tested to obtain the basic information for improving the yield, quality, and cultural environments through the quantitative growth analysis. Growing plants were sampled at intervals of 10 days from 20 days after sowing. Whole plant weight increased during the period of 11-20 days after sowing in both varieties. The weight of each organ between two varieties increased similarly except leaf area. Whole plant weight changed more close to pod weight than any other characters. The leaf areas of both varieties increased from 50 days after sowing, var. white displayed S type curved line but var. reddish displayed slow S type curved line. The SGR of whole plant weight in both varieties had 3 maxima and 2 minima, 3 maxima and first minimum were shown at the same period but the second minimum was shown at different period. Both varieties showed bimodal curved line. All SGR of each organ and leaf area were shown the 2 maxima and 1 minimum in both varieties. The changes of SLA and LAR were not remarkable between two varieties but these were united together with the maximum of whole plant weight and root weight. ULWR and ULWR were shown similar in both varieties. Reddish variety was more prosperous in early growth stage than white variety because SLA, LAR and LWR were high. In surplus weight, both varieties increased rapidly during the period of 111-120 days after sowing that was applicable to the maximum SGR of pod weight. Surplus weight of var. white increased markedly during the same period comparing those of var. reddish.

Tuberous roots of yacon (Polymnia sonchifolia Poeppig ＆ Endlicher) were stored in different temperature and relative humidity conditions after curing for 30 days. Non-decadent percentage, moisture contents, brix degree and sugars were investigated. Whether temperature and relative humidity were high or not, most of the tuberous root decayed during storage, and the decayed percentage was increased as long as the storage period. In final, only 13% of tuberous roots remain intact at 4~circC , 85% relative humidity condition to be appeared best storage condition in this experiment and all of the tuberous root decayed in other storage conditions after 6 months. Moisture contents decreased a little in the high relative humidity. Even though tuberous roots decayed when stored at 10~circC and 20~circC , most of brix degree reached about 17.0. Fructose, glucose and sucrose contents were 1.65, 1.15 and 0.35% at early storage period, and 1.6, 1.1 and 0.5% after 6 months at 4~circC , 85% relative humidity, respectively. In 3 temperature conditions, fructose and glucose increased for a month and then decreased successively afterwards, but sucrose increased gradually during 6 months. Also in 4 relative humidity conditions, fructose, glucose and sucrose contents were changed with similar to that of in temperature. Changes of fructose and glucose were the same except on 4~circC , 85% relative humidity, that was lower level than moisture of tuberous root.