Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)
- Volume 12 Issue 4
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- Pages.218-225
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- 1992
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- 2287-5824(pISSN)
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- 2287-5832(eISSN)
Comparison of Winter Hardiness in Orchardgrass Varieties
Orchargrass 품종의 월동성 비교
Abstract
This experiment was carried out to compare the varietal differences of winter hardiness based on the values of winter hardiness index(W1) and the dry weight of plant per relative tiller appearance rate (DWIRTAR), and the evaluate the method of measurements for winter hardiness in 17 orchardgrass varieties grown under mountainous area of Tackwalyon, Kangwon-do. Korea. The results were summarized as follows: 1. Seedling vigours(SV) of plant before wintering indicated highly significant negative correlation with the dry weight of 1st cutting(DW) and the dry weight of plant per relative tiller appearance rates (DWIRTAR). 2. The dry weight of 1st cutting(DW) indicated significant positive correlations with the number of tillers per plant(NT). dry weight of a tiller(WT), lield survival rate(SR). heading rate(HR) and the dry weight of heading tillers(HDW). 3. Correlation coefficients of the dry weight of 1st cutting(DW) with winter hardiness index(W1) was 0.499(p<0.05), and the dry weight of plant per relative tiller appearance rates(DW/RTAR) was 0.895(p<0.001), respectively. 4. Between the winter hardiness index(W1) and field survival rate(SR) showed highly significant positive correlation(p<0.001). And, the dry weight of plant per relative tiller appearance rates(DW/RTAR) showed highly significant positive correlation(p<0.001) with the dry weight of a tiller(WT) and the dry weight of heading tillers(HDW). 5. The varieties were classified into 2 groups by winter hardiness index(W1). The 13 varieties of Hallmark. lna, Rancho, Amba, Filippa, Sparta, Hokuto, Kitamidori, Okamidori, Wasemidori, Shinyo, Potomac and Summer-green belong to the group of W1)100, and 4 varieties of Able, Juno, Napier and Jesper belong to the group of WI(100, respectively. 6. And, also classified into 2 groups by the dry weight of plant per relative tiller appearance rates (DWIRTAR). The 4 varieties of Amba, Okamidori, Wasemidori and Summer-green belong to the group of DW1RTAR)l.O and 13 varieties of Able, Hallmark, Ina, Juno, Napier, Rancho, Filippa. Jesper, Sparta, Hokuto, Kitamidori, Shinyo and Potomac belong to the group of DW/RTAR(1.0, respectively. The variety with DW/RTAR)I.O is belong to the group of high potential winter hardiness, and also obtained a high values over the 100 of winter hardiness index(W1). 7. The dry weight of plant per relative tiller appearance rates(DW/RTAR) may be a very useful ecological character to evaluate the potential winter hardiness of orchardgrass varieties grown under mountainous area of Taekwalyon(altitudinal ranges about 800m).
대관령지역에서 orehardgrass 17개 품종을 공시하 여 월동성지수와 상대경수출현율당 개체중에 의한 월동성의 품종간 차이를 비교함과 동시에 월동성검 정에 유효한 형질을 평가하고자 하였다. 1. 월동전 유식물체의 초세는 l번초의 개체중과 상대경수출현융당 개체중과는 유의한 부의 상관을 나타내었다 2. I번초의 개체중은 개체당경수,I경중,포장생존율, 출수율 및 출수경중과는 유의한 정상관이 인정되었다 3. I번초의 개체중은 월동성지수와는 5%수준, 상대 경수출현율당 개체중과는 1%수준의 유의한 정상관이 인정되었다. 4 .월동성지수는 포장생존율과 상대경수출현융당 개체중은 1경중 및 출수경중과 각각 1%수준의 정상 관이 인정되었다. 5 월동성 지수에 의하여 2품종군으로 분류할 수 있는데 월동성지수가 100이상인 품종에는 Hallmark, lna, Rancho, Amba, Filippa, Sparta, Hokuto, Kitam midori, Okamidori, Wasemidori, Shinyo, Potomac 그리고 Summer-green의 13개 품종이 포함되었고, 월동성지수가 100미만의 품종에는 Able, Juno, Napier 그리고 Jesper의 4개 품종이 포함되었다. 6. 상대경수출현융당 개체중에 의해서도 2 품종군 으로 분류할 수 있는데 상대경수출현율당 개체중이 l 1.0이 상의 품종에 는 Amba, Okamidori, Wasemidori 그리고 Summer-green의 4개 품종이 포함되었고, 100미만의 품종에는 Able, Hallmark, lna, Juno,Napier, Rancho, Filippa, Jesper, Sparta, Hokuto, K Kitamidori, Shinyo 그리고 Potomac의 13개 품종이 포함되였다 상대경수출현율당 개체중이 1.0이상으로 월동성이 높은 품종은 Amba, Okamidori, Wasemidori, Sum¬m
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