Journal of
Plant Breeding and Crop Science

  • Abbreviation: J. Plant Breed. Crop Sci.
  • Language: English
  • ISSN: 2006-9758
  • DOI: 10.5897/JPBCS
  • Start Year: 2009
  • Published Articles: 409

Full Length Research Paper

A study on stigma receptivity of cytoplasmic-nuclear male-sterile lines of pigeonpea, Cajanus cajan (L.) Millsp.

R. H. Luo1, V. A. Dalvi1 , Y. R. Li1 and K. B. Saxena2
  1Crop Genetic Improvement and Biotechnology Laboratory, Guangxi Academy of Agricultural Sciences, Nanning, P.R. China 530007. 2International Crops Research Institue for the Semi-Arid Tropics (ICRISAT), Patancheru, A.P. India.
Email: [email protected]

  •  Accepted: 02 July 2009
  •  Published: 31 August 2009

Abstract

 

Stigma receptivity in pigeonpea [Cajanus cajan (L.) Millsp.] was studied using 2 male-sterile lines (ICPA 2039 and ICPA 2043) under field conditions. An experiment was conducted to observe the stigma receptive period at Nanning (22°N 108°E) in Southern China. The study revealed that the stigma was receptive 48 h before flower opening and continued up 4 days after flower opening. The peak stigma receptivity was on the day of flower opening with 84 and 86% pod set after hand pollination in the male-sterile lines ICPA 2039 and ICPA 2043, respectively. This floral stage is characterized by the corolla to calyx length ratio of 2.75 ± 0.075 (ICPA 2039) and 2.60 ± 0.283 (ICPA 2043). The long time span of stigma receptivity in pigeonpea encourages insect-aided natural out-crossing. This information will help breeders to carry out hybridization activity with high success rates. Also the long receptivity may facilitate more seed yield in isolated seed production blocks.

 

Key words: CMS lines, pigeonpea, stigma receptivity.