Evaluation of Quantitative Trait Locus (QTL)pyramided lines for early maturity and high spikelet number in rice (Oryza sativa L.) through SSR markers and agronomic traits.

Date

4-2013

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Ishimaru, Tsutomu

Abstract

One method in order to mitigate drought stress in rice is through drought escape, which can be achieved by developing varieties with short days to heading (sDTH) but in turn would lead to low spikelte number due to the decreased growth duration. This can be compensated by pyramiding near-isogenic lines (NILs) for short days to heading (sDTH-NILs) and high total spikelet number (TSN-NILs). Pyramiding lines were developed in the International Rice Research Institute - Japan (IRRI-Japan) by crossing IR64-NIL with IR64-NIL5 with fixed QTL for DTH and TSN, respectively. Four entires were selected as candidate pyramided lines. These were PYV 206, PYV 212, PYV 215 and PYV 218. These selected lines were evaluated for their agronomic traits, which were then compared PYV 212, and higher TSN, except for PYV 218. This indicates compensation in yield penalty due to shorter growth period and thus plant materials introgressed with QTL for SDTH and TSN is achieved.

Language

English

Location

UPLB Main Library Special Collections Section

Call Number

Thesis

Document Type

Thesis

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