Length Of Reproductive Phase Research Articles

Evaluation of Lentil Genepool for Yield and Some Yield Related Attributes

Lentil is an important pulse crop in Pakistan which is used in combination with cereals to balance the diet. Lentil area and production is declining for the last ten year. The current study is devised to evaluate lentil germplasm for the high yield performance at the Ayub Agricultural Research Institute, Faisalabad. Hundred accessions of lentil germplasm (Lens culinaris L.) were estimated for morphological and yield related attributes. Field performance results showed that lentil lines indicated major differences for their morphological studied factors. AARI-L-540, AARI-L-302, AARI-L- 411, AARI-L-562, AARI-L-454, AARI-L-417, AARI-L- 650, AARI-L-701, AARI-L-284, AARI-L-124, AARI-L-234, AARI-L-318, AARI-L-530, AARI-L-550, AARI-L-272, genotype analyzed the maximum plant biomass, highest seed yield, 1000 seed weight, number of pods, plant height at maturity and flowering, length of reproductive phase, days to flowering and maturity, harvest index, Degree of indetermination, primary and secondary branches of plant, No of pods/plant, seed per pod, canopy temp, internode distance, no of nodes and leaves were calculated respectively. Principal component analysis statistically applied on these traits. First eight principal component analyses (PCA) expressed 88.52% of total variation in which PC I, PC II, PC III, PC IV, PC V, PC VI, PC VII & PC VIII accounted for 19.12%, 11.24%, 610.05%, 29.66%, 7.19%, 36.75%, 75.88%, 5.58% of total variation. The data was statistically analyzed to find out the superior genotype for the above mentioned character.

Hasil dan Komponen Hasil Kedelai (Glycine max L. Merr) yang Diberi Pemupukan Nitrogen Lanjutan pada Fase Reproduktif (R1)

Penelitian ini bertujuan mengetahui pengaruh pemupukan nitrogen lanjutan pada fase reproduktif pada hasil dan komponen hasil kedelai. Percobaan akan dilakukan di Kebun Percobaan (teaching dan research farm) Fakultas Pertanian Universitas Jambi mulai bulan April 2014 sampai dengan September 2014. Percobaan disusun dalam rancangan acak kelompok pola faktorial dengan dua ulangan. Faktor pertama adalah empat varietas kedelai dan faktor kedua adalah dosis pemupukan nitrogen lanjutan yang terdiri atas 0 kg Nitrogen(n0), 40 kg ha-1 (n1), 50 kg ha-1 (n2), dan 60 kg ha-1. Variabel yang diamati adalah panjang fase reproduktif, jumlah polong per tanaman, jumlah polong berisi, bobot 100 biji, bobot dan biji per tanaman. Hasil memperlihatkan bahwa tidak terdapat perbedaan pengaruh nitrogen pada tiap-tiap varietas yang dievaluasi. Terdapat perbedaan panjang fase reproduktif, jumlah polong total per tanaman, jumlah polong berisi per tanaman, dan bobot 100 biji diantara varietas kedelai. Pada sisi lain, pemupukan nitrogen kedua berbeda dosis memberikan pengaruh yang nyata pada variabel jumlah polong total per tanaman, jumlah polong berisi per tanaman, dan bobot biji per tanaman. Keempat varietas memiliki potensi hasil yang sama jika dikembangkan diwilayah sekitar wilayah penelitian. Namun jika ingin mendapatkan ukuran biji yang lebih besar, varietas anjasmoro sangat direkomendasikan. Dosis terbaik yang dapat meningkatkan hasil antar varietas adalah n2 (50 kg N ha-1).

Study of heritable variation and genetics of earliness in mungbean (Vigna radiata L. Wilczek)

Fifty-five mungbean lines were evaluated for days to maturity and grain yield per plant. This material showed considerable range of variability for the target traits. Eight genetically diverse parents were selected and used for a full diallel set of crosses to study the mode of inheritance for earliness related parameters (days to flowering, days to maturity and length of reproductive phase) during summer 2005. The F1 generation of these crosses was sown during the spring of 2006 and the selfed seeds were used to raise the F2 generation during kharif season. The data recorded from two generations were subjected to genetic analysis. The formal ANOVA showed the significance of both additive and dominance effects for all the traits in both generations. Significance of D, H1 and H2 components also confirmed the contribution of both additive and dominance effects in controlling the inheritance of these traits. The estimates of narrow sense heritability were low to moderate except higher estimates for days to maturity in F2 generation, while the broad sense heritability estimates were relatively higher. Seasonal and environmental effects were also found to be significant. In view of the complex nature of gene action for earliness, it is suggested that breeders should look for transgressive recombinants of earliness and other desirable attributes in later segregating generations to gain higher genetic advance. The variety NM92 was found to be the best source of earliness in mungbean breeding.