Heterosis for vegetative stage cold tolerance in rice

• 발행기관: 한국육종학회
• 저자명: Huhn Pal Moon(文憲八) 알 엔 카우(R.N. Kaw) Jong Doo Yae(芮鍾斗)
• 간행물 정보: 『한국육종학회지』Vol.19 No.4, 57~62쪽, 전체 6쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 1987.12.30

영문 초록

Heterosis for low-temperature tolerance at the vegetative growth stage was studied in ninety F₁ rice hybrids. The F₁s were transplanted in 2.25-m long single row plots, replicated thrice and were subjected to cold water stress at 17℃ and 20℃, in separate blocks, starting from 20 days after transplanting until maturity. Leaf-discoloration was used as a measure of cold tolerance at the vegetative stage. Average mid-parent heterosis of - 40.7% and high-parent heterosis of - 61.9% was recorded in the japonica/indica group of crosses as compared to -18.6% and -26.0%, respectively, in the indica/indica group. Heterosis for cold hardiness was greater for the japonica/indica group of hybrids with 95.8% hybrids showing significant negative mid-parent heterosis and 100% high-parent heterosis (low leaf-discoloration scores mean high cold hardiness). In indica/indica group, only 6.3% had lower scores in japonica/indica group, suggesting some involvement of complimentary gene action in the inheritance of cold hardiness. Barkat/IR 29506, Shimokita/IR 29506 and Suweon 235 /IR 29506 from the japonica/indica group exhibited better cold tolerance than their respective cold tolerant parents. The correlation between mid-parent value and hybrid perfromance was of sufficient magnitude to indicate that prediction of hybrid performance from parental value should prove effective.

목차

ABSTRACT

INTRODUCTION

MATERIALS AND METHODS

RESULTS AND DISCUSSION

REFERENCES

摘要