Photo-sensitive Genetic Male Sterility in Rice and Its Application

  • Nguyễn Thị Trâm

Abstract

Hanoi is situated in the 210N latitude where shortest days (10 hours and 52 minutes) occur from 12th December to 1st January and longest day (13 hours and 24 minutes) from 15 to 30th June. The day length increased from January to June and decreased from June to December. Therefore, a suitable photo-sensitive genetic male sterile line suitable for hybrid development in Vietnam should have critical sterility - inducing photoperiod (CSIP) of 12 hours and 15 minutes to 12 hours and 30 minutes .

Two new photo- sensitive genetic male sterile (PGMS) lines, P5S and P28S, were selected from the F2 population resulting from T1S-96/Pei ai 64S and T1S-96/Huong 125S, respectively. They have critical sterility inducing photoperiod (CSIP) from 12 hours and 16 minutes to 12 hours and 18 minutes. In Hanoi (210N latitude), these lines express sterility from May 12th to September 26th  (167 days) and fertility from September 28th to May 8th (198 days). The genetic study revealed that the photoperiod -sensitive  genetic male sterility in P5S was controlled by a single recessive gene. The hybrids derived from P5S showed high level of heterosis.
điểm /   đánh giá
Published
2012-11-21
Section
Bài viết