Scientific Publication

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

author(s) Luo, R H - Dalvi, V A - Li, Y R - Saxena, K B
from International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)
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  • Eastern Asia
  • Asia
  • World
citation

Luo, R H and Dalvi, V A and Li, Y R and Saxena, K B (2009) A study on stigma receptivity of cytoplasmic-nuclear male-sterile lines of pigeonpea, Cajanus cajan (L.) Millsp. Journal of Plant Breeding and Crop Science, 1 (6). pp. 254-257
A study on stigma receptivity of cytoplasmic-nuclear male-sterile lines of pigeonpea, Cajanus cajan (L.) Millsp

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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 malesterile 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

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