Cytological Characterization of Interspecific Hybrids in Rice (Oryza sativa L.)

• 발행기관: 한국육종학회
• 저자명: Eung Gi Jeong Darshan S. Brar Kyung Ho Kang Heung Goo Hwang Kshirod K. Jena Ho Yeong Kim Sang Nag Ahn Gihwan Yi Min Hee Nam
• 간행물 정보: 『한국육종학회지』Vol.37 No.1, 52~56쪽, 전체 5쪽
• 주제분류: 농수해양 > 기타농수해양
• 파일형태: PDF
• 발행일자: 2005.02.28

영문 초록

The wild species of Oryza are an important source of useful genes for resistance to biotic and abiotic stresses in rice. In this study, wide hybridization was used to widen the genepool of japonica rice cultivars. Interspecific crosses were made between three japonica rice cultivars and four wild species of the genus Oryza. Hybrids were produced normally through crosses between O. sativa (AA genome) and O. rufipogon (AA genome). However, hybrids between O. sativa and other distantly related wild species such as O. officinalis (CC genome), O. minuta (BBCC genome), and O. alta (CCDD genome) were produced following hybridization and embryo rescue. The hybrids were intermediate in their morphological characters, compared with the parents of cultivated and wild species. The hybrids between O. sativa and O. rufipogon were partially sterile but the hybrids between O. sativa and O. officinalis, O. sativa and O. minuta, O. sativa and O. alta were completely sterile. Cytological analysis of the interspecific hybrids, AA x CC, AA x BBCC, AA x CCDD showed irregular meiosis with predominant occurrence of univalents and unequal distribution of chromosomes at anaphase 1 of meiosis. Genomic In-situ Hybridization (GISH) analysis showed the presence of O. minuta chromosomes in the F₁ hybrids between O. sativa and O. minuta cross.

목차

Abstract

INTRODUCTION

MATERIALS AND METHODS

RESULTS AND DICUSSION

CONCLUSION

LITERATURES CITED

키워드

Wild species japonica rice embryo rescue interspecific hybrid O. sativa