Hệ thống quản lý khoa học - Root plasticity under fluctuating soil moisture stress exhibited by backcross inbred line of a rice variety, Nipponbare carrying introgressed segments from KDML105 and detection of the associated QTLs

Tên bài báo:	Root plasticity under fluctuating soil moisture stress exhibited by backcross inbred line of a rice variety, Nipponbare carrying introgressed segments from KDML105 and detection of the associated QTLs (Lượt xem: 431)
Tên tạp chí:	Plant Production Science Vol 21 Issue 2
Tạp chí thuộc:	Tạp chí KH quốc tế ISI
Chỉ số IF/H:	0.848
Năm xuất bản:	2018
Nước xuất bản:	Nhật Bản
Tác giả thuộc Học viện:	TS. Nguyễn Thị Ngọc Dinh
Các tác giả bài báo:	Stella Owusu-Nketiaa, Yoshiaki Inukaib, Satomi Ohashia, Roel Rodriguez Suraltac, Kazuyuki Doia, Shiro Mitsuyaa, Mana Kano-Nakataa,d, Jonathan Manito Nionese, Dinh Thi Ngoc Nguyena,f, Kabuki Takuyaa, Daigo Makiharab and Akira Yamauchia aGraduate School of Bioagricultural Sciences, nagoya university, nagoya, Japan; binternational corporation center for agricultural education, nagoya university, nagoya, Japan; cagronomy, Soils and Plant Physiology division, Philippine rice research institute (Philrice), Muñoz, Philippines; dinstitute for advanced research, nagoya university, nagoya, Japan; ePlant Breeding and Biotechnology division, Philrice, Muñoz, Philippines; fFaculty of agronomy, Vietnam national university of agriculture, Hanoi, Vietnam
Tóm tắt bài báo:	In rainfed lowland rice ecosystem, rice plants are often exposed to alternating recurrences of waterlogging and drought due to erratic rainfall. Such soil moisture fluctuation (SMF) which is completely different from simple or progressive drought could be stressful for plant growth, thereby causing reduction in yield. Root plasticity is one of the key traits that play important roles for plant adaptation under such conditions. This study aimed to evaluate root plasticity expression and its functional roles in dry matter production and yield under SMF using Nipponbare, KDML 105 and three backcross inbred lines (BILs) and to identify QTL(s) associated with root traits in response to SMF at two growth stages using Nipponbare/KDML105 F2 plants. A BIL, G3-3 showed higher shoot dry matter production and yield than Nipponbare due to its greater ability to maintain stomatal conductance concomitant with greater root system development caused by promoted production of nodal and lateral roots under SMF. QTLs were identified for total nodal root length, total lateral root length, total root length, number of nodal roots, and branching index under SMF at vegetative and reproductive stages. The QTLs detected at vegetative and reproductive stages were different. We discuss here that relationship between root system of G3-3 and the detected QTLs. Therefore, G3-3 and the identified QTLs could be useful genetic materials in breeding program for improving the adaptation of rice plants in target rainfed lowland areas.
Link:	https://www.tandfonline.com/doi/full/10.1080/1343943X.2018.1446759