Agronomic traits and cytogenetic evaluation of newly developed autotetraploid rice line. | [Pakistan Journal of Agricultural Sciences • 2016]

Author(s):

1. Haibin Guo: State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural, University, Guangzhou, China

2. Muhammad Qasim Shahid: State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural, University, Guangzhou, China

3. Jian Zhao: State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural, University, Guangzhou, China

4. Yajuan Li: State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural, University, Guangzhou, China

5. Lan Wang: State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural, University, Guangzhou, China

6. Xiangdong Liu: State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural, University, Guangzhou, China

Abstract:

Autotetraploid rice is an important germplasm and has a great scope to increase rice yield but low seed set is a major encumbrance in its utilization. The present study was planned to observe the cytogenetic and agronomic characteristics of newly developed highly fertile autotetraploid rice line (1162). Agronomic traits, male and female gametophytes of newly developed autotetraploid rice (1162) and their hybrids showed better performance as compared to its parents and other autotetraploid rice lines. The mean of panicle length, number of grains per panicle, filled grains per panicle, 1000-grain weight, grain length, grain width, and seed set were 25.04cm, 103.38 grains, 83.56 grains, 43.44g, 9.54mm, 4.04mm and 81.58%, respectively. The meiotic analysis showed that the mean meiotic configurations of 1162 at diakinesis were (0.13±0.05) I + (4.89±0.26) II +(0.02±0.00) III +(9.45±0.13) IV. The frequency of trivalent and univalent in new line was lower than the autotetraploid lines (control) at diakinesis and metaphase I, and the configuration of chromosome in 1162 was more symmetrical, which was in favor of 2/2 segregation of homologous chromosome, although higher number of quadrivalents were found than parents. Heterosis of hybrids crossed with 1162 was not only positive but also attained highly significant levels for important quantitative traits. The results showed that high fertility can be inherited and have important applications and research value.

Page(s): 291-301

DOI: DOI not available

Published: Journal: Pakistan Journal of Agricultural Sciences, Volume: 53, Issue: 2, Year: 2016

Keywords:

Keywords are not available for this article.

References:

References are not available for this document.

Citations

Citations are not available for this document.

Citations

Downloads

Views